Dan Lawrence gave Joe Root a first-hand look at his talents on debut in Sri Lanka and the England Test captain came away impressed.

Root brought up his 18th century in the longest format and reached 168 not out before rain and bad light spared Sri Lanka the punishment of an evening session on day two.

The other stand-out turn in England amassing 320-4 - a first-innings lead of 185 after the hosts were skittled on day one - was Lawrence, who plundered a stylish 73 to announce himself at the highest level.

A mighty slog-swept six off left-arm spinner Lasith Embuldeniya came with ample panache and was the shot of the day.

He helped add 173 alongside Root for the fourth wicket and the captain looked on approvingly.

"I'm very impressed, I thought he played magnificently well," he said.

"He showed exactly why he deserves his opportunity to play, and hopefully it is the start of something very special for him."

Root surpassed Kevin Pietersen's 151 in Colombo nine years ago to register England's highest score in Sri Lanka.

Despite this being his first Test century since November 2019, the Yorkshireman showed he had not lost his knack for going big - this his eighth score in excess of 150.

"Generally when I make a 100, I make it really count," he said.

"I have got quite a good record past 100, so tomorrow I will be trying to make that another really big one and drive the game forward from there.

"I felt that I got in a really good mindset throughout this game so far and I will try and take that into the rest of this winter tour and beyond.

"The previous couple of hundreds that I have got - even though they were a while ago - have come at the end of series.

"So to get one at the start of a very long winter is quite exciting, and hopefully I can take that forward into the rest of the game."

Joe Root led from the front with an unbeaten century to leave England in complete control of the first Test against Sri Lanka in Galle.

Resuming on 66, the England captain batted throughout truncated day two in masterful fashion, reaching 168 at tea before rain and bad light put paid to the final session, with the tourists on 320-4 - a first-innings lead of 185.

Debutant Dan Lawrence made a wonderfully fluent 73 as part of a 173 alongside Root, with Sri Lanka's main hopes of avoiding a heavy defeat already seemingly pinned on further unseasonably wet weather.

Events might have panned out very differently had Dilruwan Perera removed Root lbw with the first ball of the day, but an umpire's call fell in the batsman's favour and he was off and running with a straight four crunched back down the ground in the same over.

The tireless Lasith Embuldeniya claimed his third wicket of the match as Kusal Mendis held a sharp chance at gully to dismiss Jonny Bairstow three runs shy of a half-century.

Unfortunately for Sri Lanka, Lawrence showed no sign of debut nerves as his attractive, smooth-wristed style transferred easily to the Test arena.

The highlight of the 23-year-old's 150-ball knock came when he launched left-arm spinner Embuldeniya for a huge, slog-swept six.

Root and Lawrence played in unhurried fashion off front and back foot, devouring a heavy diet of spin bowling until Dilruwan found extra bounce with the second new ball to have the youngster caught by Mendis at short leg.

Jos Buttler's scratchy progress against Dilruwan showed batting might not be quite as easy on a turning surface as Root and Lawrence suggested, meaning England are ominously placed despite the lost time.

Root begins pivotal year in emphatic fashion

A packed 2021 schedule is likely to define Root's reign as England's Test captain, with home and away series against India preceding a trip to Australia and a third crack at Ashes glory in his tenure.

He probably took a light lunch, having ended the first session on 99 in pursuit of a first ton in the longest format since November 2019.

In truth, the immaculate balance and judgement Root displayed throughout made an 18th Test century feel like a formality and, after nudging a single off Dilruwan from the second ball of the session, he went on to surpass Kevin Pietersen's 151 in Colombo in 2012 to make England's highest individual score in Sri Lanka.

Lawrence gives England a handy problem

Root and head coach Chris Silverwood will need to call on squad depth as they negotiate the challenges of the year to come and Lawrence's stylish introduction to the middle order was most welcome.

A remodelled Test side designed to bat time at the top of the order with the likes of Dom Sibley, Zak Crawley and Rory Burns now has another option in the engine room to make the purists purr. Ollie Pope knows he must hit the ground running on his expected return from shoulder surgery in India.

Embuldeniya gamely holds the fort in Galle

Sri Lanka's spinners have matched their batsmen for ineptitude at times, with Dilruwan struggling for length before finding some rhythm prior to tea and leg-spinner Hasaranga De Silva (0-63) going at more than four an over.

Skipper Dinesh Chandimal has turned time and again to Embuldeniya, who has wheeled through 38 overs for his 3-131. If a five-wicket haul arrives it will be the result of relentless toil.

Dom Bess claimed a five-wicket haul as England seized immediate control of the first Test against Sri Lanka, skittling their hosts for 135 before reaching 127-2 in reply.

Captain Joe Root and the recalled Jonny Bairstow combined to put on an unbroken third-wicket partnership worth 110 in the final session, the duo finishing unbeaten on 66 and 47 respectively as the tourists dominated the opening day of the series.

As for Sri Lanka, their problems started prior to the game getting underway as skipper Dimuth Karunaratne was ruled out due to a fractured thumb. 

Stuart Broad (3-20) claimed two early wickets as Sri Lanka were reduced to 25-3; they never recovered and were bowled out for the lowest first-innings score in a Test staged at Galle International Stadium.

Angelo Mathews - back in the Sri Lanka XI - combined with stand-in skipper Dinesh Chandimal to put on 56 for the fourth wicket, but that was the only partnership of real note in an innings that spanned a mere 46.1 overs. 

Chandimal top-scored with 28 before he was superbly caught in the covers by Sam Curran off Jack Leach (1-55), leaving the score at 81-5 early in the afternoon session. 

Niroshan Dickwella (12) chopped a long hop from Bess to backward point, while the off-spinner also benefited from a lucky deflection off short leg Bairstow - who took the full brunt of a sweep shot - that allowed wicketkeeper Jos Buttler to catch Dasun Shanaka (23). 

Dilruwan Perera fell quickly for a duck and, after a Leach finger tip saw Lasith Embuldeniya run out at the non-striker's end, Bess bowled PWH de Silva to complete his second five-wicket haul in Tests. 

England's reply stuttered early as opening pair Dom Sibley and Zak Crawley fell cheaply, both dismissed by left-arm spinner Embuldeniya to leave the score at 17-2. 

However, Bairstow – who hit a century when batting at number three in England's previous Test on Sri Lankan soil, back in 2018 – capitalised on his opportunity back in a team minus top-order regulars Rory Burns and Ben Stokes.

Root had needed a review to overturn an lbw decision against him on 20, but otherwise made serene progress to a half-century that means his team trail by just eight runs heading into Friday's action.

Sri Lanka and England both have plenty to ponder over team selection as they prepare to finally face each other in Test action again. 

The nations were due to meet in March 2020, only for their two-match series to be postponed amid the escalating coronavirus pandemic. England were playing a tour game in Colombo at the time when the decision was taken to cut short the trip and head home. 

They have returned 10 months later for a rearranged tour, with the ongoing COVID-19 situation seeing them hosted in a bio-secure bubble for both games in Galle. 

However, Moeen Ali will miss the first Test – and possibly the next one that follows – after a positive test result upon arrival. Chris Woakes had to self-isolate having been considered a close contact, so missed out on England's only warm-up game. 

Moeen was joint-leading wicket-taker with fellow spinner Jack Leach - taking 18 wickets apiece - when England swept the hosts 3-0 on spin-friendly pitches when visiting Sri Lanka in late 2018, though captain Joe Root is aware the surfaces may not be the same now.

"We are very aware that the conditions might be very different to the last time we played here," Root told the media.

"We are not going to have too many preconceived ideas about what we are going to come up against. It's quite dangerous and lazy to walk into a series like that." 

The tourists are without Jofra Archer and Ben Stokes – who are both rested with a long tour to India to follow immediately afterwards – while opening batsman Rory Burns has remained in England for the birth of his first child. 

As for the hosts, a recent 2-0 Test series defeat in South Africa came at a cost in terms of injuries. Dhananjaya de Silva and Kasun Rajitha are both sidelined, plus Oshada Fernando has had no match practice after a spell out of action. 

However, there is good news over the fitness of batsman Dinesh Chandimal – who missed the second Test against the Proteas – and seamer Suranga Lakmal, plus former captain Angelo Mathews is back as Sri Lanka aim for a first Test win over their opponents since a famous triumph at Headingley in 2014. 

JONNY BE GOOD AGAIN?

With holes to fill in the batting order due to key absences, England are set to hand a debut to Dan Lawrence and recall Jonny Bairstow, who appears to be the choice to bat at number three with Zak Crawley moving up to open.

Bairstow made a century at that position in the previous Test against Sri Lanka, the third time in four first-innings knocks he has reached three figures against them. However, he has not played in the format since 2019, having lost his place after averaging 18.6 in 19 innings during that year.

Wicketkeeper Ben Foakes played a starring role for England in Sri Lanka last time, averaging 69.25 with the bat, but looks set to miss out on the final XI.

LEADING FROM THE FRONT

Captain Dimuth Karunaratne's century in the second Test against South Africa was one of few positives for Sri Lanka in a 10-wicket defeat in Johannesburg to start the new year.

The opening batsman has averaged 66 on home soil in Tests since 2018 (14 innings), though none of his 10 career hundreds have come against England. 

Having Mathews back should ease some of the run-scoring burden, too. The 33-year-old may not contribute much with the ball these days but does average 45.31 with the bat in Tests. He will go into the opening game needing just 19 more runs to reach 6,000 in the format.

KEY OPTA FACTS

- England have won their previous two bilateral Test series against Sri Lanka; they are attempting to record three successive victories against them for the first time.
- Sri Lanka come into the series having only mustered one win in their past seven Test matches (D2 L4); they have just suffered a 2-0 series defeat against the Proteas, losing the opener by an innings margin before slumping to a 10-wicket loss in the second match of the series in South Africa.
- The hosts have only lost once in five Test matches against England at Galle International Stadium (W2 D2). However, the most recent meeting between the sides at the venue was won by the tourists.
- Sri Lanka have managed to get the umpire's decision overturned in 23 per cent of their referrals in Tests since the start of 2019. Only Australia (22 per cent) have a lower rate; England's record stands at 31 per cent across that period.
- Despite making his Test debut in Sri Lanka over 13 years ago, Stuart Broad has only played three Test matches in the country. He has picked up three wickets there (averaging 83), but is six scalps away from going above Courtney Walsh (519) and into sixth in the list of all-time leading Test wicket-takers.