Tony Finau and Cameron Champ posted a four-under-par 68 in alternate-shot play for a share of the Zurich Classic of New Orleans lead following the second round.

After the opening round consisted of four-ball play at the longstanding PGA Tour tournament, which turned into a team event in 2017, day two switched to the foursomes format.

American pair Finau and Champ head into the weekend 13 under through 36 holes, two strokes clear alongside Norwegian duo Viktor Hovland and Kris Ventura, who were tied for the lead after day one.

Hovland and Ventura posted a 69 on Friday to stay atop the leaderboard at TPC Louisiana.

"I know we're having a good time with this format up to this point," Finau said. "We've both played some really solid golf, and we find ourselves at the top of the leaderboard.

"We'll do what we've been doing the last couple days, which is enjoy each other's company and not add any bonus pressure when it comes to team-mate golf."

Justin Rose-Henrik Stenson and Bubba Watson-Scottie Scheffler are 11 under at the halfway stage of the tournament.

Defending champions Jon Rahm and Ryan Palmer recorded a two-under-par 71 to be five shots behind.

Meanwhile, Graeme McDowell – playing alongside Matt Wallace – aced the 217-yard 17th hole to finish the day with a 70.

Viktor Hovland and Kris Ventura ended the opening round tied for the lead alongside Brice Garnett and Scott Stallings at the Zurich Classic of New Orleans.

The longstanding PGA Tour tournament turned into a team event in 2017, with the first and third rounds consisting of four-ball where everyone plays their own shot and the best score counts. The second and fourth rounds feature foursome play or alternate shot.

On Thursday, after the 2020 edition was cancelled due to the coronavirus pandemic, Hovland-Ventura and Garnett-Stallings moved a stroke clear atop the leaderboard at TPC Louisiana.

Both teams carded bogey-free 10-under-par 62s, ahead of Cameron Champ-Tony Finau, Billy Horschel-Sam Burns, Keegan Bradley-Brendan Steele, Lee Kyoung-hoon-Kyle Stanley, Mark Hubbard-Sebastian Cappelen, Louis Oosthuizen-Charl Schwartzel and March Leishman-Cameron Smith.

Xander Schauffele, who threatened to break through for his maiden major title at the Masters, and Patrick Cantlay are eight under heading into the second round, along with Bubba Watson-Scottie Scheffler.

Defending champions Jon Rahm and Ryan Palmer opened their bid for back-to-back titles with a 65 to earn a share of 16th position, three strokes off the pace, while Justin Rose-Henrik Stenson are also seven under.

Harris English secured his first win since 2013 with a play-off victory at the Tournament of Champions on Sunday.

The American carded a four-under 69 in the final round to finish alongside Joaquin Niemann (64) at the end of regulation in Kapalua, Hawaii.

English stepped up to birdie the par-five 18th hole in the play-off, overcoming Niemann for his first win since 2013.

"It's incredible," he told the Golf Channel after his third PGA Tour success.

"A lot of hard work over the years, you never think you're going to get here again, winning twice back in 2013 and it's just hard to win out here.

"I had a really good chance this week and felt good about my game and you've just got to get it done."

Niemann produced a stunning nine-under 64 in the final round to finish at 25 under.

But English birdied his final hole to force a play-off and he delivered to secure the title.

Two-time champion Justin Thomas (66) finished at 24 under, a shot ahead of Ryan Palmer (71).

Im Sung-jae (69) and Xander Schauffele (66) ended up tied for fifth at 21 under.

World number two Jon Rahm got going with a six-under 67, but it was only enough to finish tied for seventh alongside Bryson DeChambeau (66) and Collin Morikawa (73).

Dustin Johnson, meanwhile, carded a second straight 69 to finish tied for 11th.

Harris English pulled two strokes clear at the halfway mark of the Tournament of Champions as Dustin Johnson and Jon Rahm made their moves.

English, who shared the overnight lead with Justin Thomas, carded a six-under 67 in the second round in Kapalua, Hawaii on Friday.

The American produced a bogey-free round that featured six birdies to move into 14 under at the first PGA Tour event of 2021.

English is two shots ahead of Thomas (69), Daniel Berger (65), Collin Morikawa (65) and Ryan Palmer (67).

Thomas, a two-time champion of the tournament, made four birdies on his front nine but a bogey at 13 slowed his momentum before picking up another shot at the last.

The world's two top-ranked players, Johnson and Rahm, charged into contention.

Johnson, who opened with a 71, made eight birdies in a second-round eight-under 65 to get to 10 under – enough for a tie for 10th.

Rahm is alongside him after the Spaniard produced a fast finish, birdieing five of his final seven holes.

Xander Schauffele (66), Brendon Todd (67), Im Sung-jae (68) and Patrick Reed (68) are tied for sixth at 11 under.

Joining Johnson and Rahm at 10 under are Scottie Scheffler (66), Bryson DeChambeau (67), Joaquin Niemann (67), Carlos Ortiz (67) and Patrick Cantlay (68).

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