Novak Djokovic said it was "a tough one" to take after Serbia's hopes of retaining the ATP Cup title were ended by defeat to Germany.
The world number one scored a tense 6-7 (3-7) 6-2 7-5 victory over Alexander Zverev in their singles rubber, levelling the match after Jan-Lennard Struff beat Dusan Lajovic in three sets.
Zverev and Struff then teamed up in doubles to net a 7-6 (7-4) 5-7 10-7 win over Djokovic and Nikola Cacic.
The singles workout and win sets up the eight-time Australian Open champion well for the start of that grand slam next week, which was the consolation Djokovic could take from defeat.
Speaking about his singles clash with Zverev, Djokovic said: "It was anybody's game really. He was a set up, a couple points here and there in the beginning of the second. I just returned well when I needed to and closed out the match.
"It's never easy playing against Sascha [Zverev] when he's in form, and he's in really good form. We pushed each other to the very limit, and I'm glad that I had such a battle with him.
"It's unfortunate we lost the tie. That's what this competition is all about. It's about the team, not about winning one match, a singles match. Yeah, it's a tough one."
Germany advance to face Russia in the semi-finals on Saturday, with Daniil Medvedev and Andrey Rublev a formidable combination awaiting them.
Spain secured a shot at Italy in the second semi-final, despite a 2-1 defeat to Greece on Friday.
The Spanish team needed just one win in the group-stage match to advance, and that predictably came as Pablo Carreno Busta, ranked 16th by the ATP, beat world number 462 Michail Pervolarakis.
His 6-3 6-4 success could not be matched by team-mate Roberto Bautista Agut, who fell to a 7-5 7-5 defeat against Stefanos Tsitsipas, while Spain retired from the doubles rubber after one game, giving Greece a 2-1 success in the tie.
It remains to be seen whether Rafael Nadal will be fit to play any part in the semi-final, with the 20-time grand slam champion having been absent so far in the campaign due to a back injury.
"He's working very hard to recover his best feelings," said Spain captain Pepe Vendrell.
"Obviously he couldn't play any matches during the week. It's a situation that we have to study. But day by day he's improving. We will see [on Saturday] if he can play."
AWAY FROM THE ATP CUP, WAWRINKA ABANDONS
In the Murray River Open, Stan Wawrinka withdrew from his quarter-final with Jeremy Chardy after beating Australian Alex Bolt in a tough three-set match earlier in the day. Corentin Moutet, Dan Evans and Felix Auger-Aliassime joined Chardy in the last-four line-up.
Evans defeated Borna Coric, who had eliminated Australian hope Nick Kyrgios in his previous match.
All ATP and WTA tournaments are being played at Melbourne Park this week.
Thursday's play was cancelled due to a COVID-19 case affecting a worker from a hotel that accommodated quarantining players, and that meant Friday's schedule was packed.
The Great Ocean Road Open also saw players needing to win two matches in a day to reach the semi-finals, with Karen Khachanov, Thiago Monteiro and the Italian pair of Jannik Sinner and Stefano Travaglia coming through.
Alcaraz begins Madrid Open campaign with emphatic win
Carlos Alcaraz continued his fine record at the Madrid Open with an emphatic 6-2 6-1 victory over Alexander Shevchenko on Friday.
The two-time defending champion made it 12 straight wins at his home tournament to ensure he will face Brazilian Thiago Seyboth Wild in the last 32.
Alcaraz was playing his first match on the ATP Tour since March 28 after being unable to compete in the Monte-Carlo Masters and Barcelona Open due to an arm injury.
But he was still able to make a fine start to his clay-court season, breaking serve in the first game and racing to victory in only one hour and eight minutes.
Data Debrief
Sometimes the scoreline can be harsh on a beaten player, but on this occasion Alcaraz was clearly dominant, breaking the Kazakh seven times in the match and forcing 11 break-point opportunities while conceding only three for his opponent.
That allowed the Spaniard to claim a dominant victory despite being broken once in each set. He will now turn his attention to a clash with Seyboth Wild, who battled past Lorenzo Musetti with a 6-4 6-4 win.
Reigning champion Sabalenka pushed by Linette at Madrid Open
Aryna Sabalenka got her Madrid Open campaign started with a 6-4 3-6 6-3 win over Magda Linette on Friday.
Sabalenka could not quite hit her peak form against Linette, but the world number two nevertheless got the job done after going the distance.
The Belarusian is hunting a record-equalling third title in Madrid, where she is the reigning champion, though she has not won back-to-back matches at a tournament since winning the Australian Open.
"It's not about being confident," Sabalenka said. "It's about how much you're ready to do to get it. It's about the hard work and to be ready, be ready for the big fights. I feel like confidence is not going to help you in those big matches. It's about staying there and fighting for it."
Data Debrief
Sabalenka (70 per cent, 56-24) is now one of five active players since 2020 to hold a winning percentage of 70 per cent or higher at WTA-1000 events.
Iga Swiatek, Simona Halep, Elena Rybakina and Jessica Pegula are the other players to feature on that list.
Rybakina continues clay winning streak with victory over Bronzetti
In-form Elena Rybakina has moved into the last 32 of the Madrid Open after a straight sets victory over Italian Lucia Bronzetti.
Number four seed Rybakina triumphed 6-4 6-3 on Friday and will next face either Marta Kostyuk or Mayar Sherif.
Rybakina was broken early in each set but ultimately had few problems getting over the line, converting four of her five break points to continue an impressive run of results after winning the Stuttgart Open last week.
She has now won five consecutive WTA matches and has 13 straight wins on clay courts to her name in a superb streak that started one year ago.
Data Debrief: Rybakina in elite company
Since the start of 2020, only two other players have claimed as many 13 consecutive WTA wins on clay, and they are Iga Swiatek and Simona Halep, so Rybakina is in elite company.
Rybakina's last defeat on this surface came in the 2023 edition of the Madrid Open, when she fell to Anna Kalinskaya in her first match, so this win represented a better start to her campaign in the Spanish capital.
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