Stan Wawrinka jokingly called Roger Federer an "a******" during an emotional speech after the Indian Wells final.
Federer claimed a record-equalling fifth title at the event with a 6-4 7-5 victory in the decider on Sunday.
The win saw Federer make it 20 victories from 23 meetings against his friend and fellow Swiss.
Wawrinka, a three-time grand-slam champion, was in tears during the trophy presentation, much to Federer's amusement.
"I would like to congratulate Roger. He's laughing, he's an a******, but it's OK," he said.
"I lost some tough ones against you, but when you played the final in Australia, I was still your biggest fan, so congrats for your comeback and congrats for today.
"Congrats to your team, to your family and everybody who's been around you for many years.
"Anybody who loves tennis loves to watch you so it's always good to see you back at that level and hopefully for many years."
The result saw Federer continue his stunning comeback from a knee injury, adding an ATP 1000 title to his 18th major trophy – secured at the Australian Open – to begin 2017.
Federer, 35, was predictably thrilled with his 90th ATP World Tour title, and hopeful he can continue his form.
"It's been just a fairytale week once again. I'm still on the comeback. I hope my body is going to allow me to keep on playing," he said.
"I was very sad when I couldn't come here last year. Just being here is a beautiful feeling. It's one of my favourite tournaments. I came here for the first time 17 years ago. So to be here again as the champion is an amazing feeling."
23 de abril 2017
|Aston Villa 1 Birmingham City 0: Agbonlahor condemns Redknapp to derby debut defeat|
|Celtic 2 Rangers 0: McGregor, Sinclair down Old Firm rivals to keep Bhoys´ treble hopes alive|
|Sassuolo 2 Napoli 2: Milik rescues Sarri´s side after Hamsik howler|
|Rooney returns for United to replace injured Ibrahimovic|
|Mbappe, Silva and Lemar to stay at Monaco - Vasilyev|
|Wanjiru wins London Marathon, Keitany sets women-only record|
|Melbourne City 0 Perth Glory 2: Castro inspires Elimination Finals revenge mission|
|Griezmann considering Manchester United and Real Madrid offers|
|Clippers will be ready despite Griffin absence - Rivers|
|Lingard backs Rashford to fill Man Utd´s Ibrahimovic void|
|Wang wins in Zhengzhou as Peng retires|
|Fury withdraws from Parker WBO heavyweight title bout|
|Wiesberger holds nerve in Shenzhen play-off triumph|
|Anelka re-opens Domenech feud over Mbappe comments|
|Late Naiqama try seals Tigers win|
|Griezmann walks out on interview after questions over Atleti future|
|Neymar to miss El Clasico after Barcelona lose patience with TAD appeal|
|Younis Khan refutes retirement U-turn rumours|
|Man Utd is not a step up for Lukaku - Koeman aims barbs at Red Devils|
|Hazard understands semi-final benching|
|Red cards, penalties and controversy - Is Pique right to fear Madrid bias in El Clasico?|
|Arsenal v Manchester City: Aguero reasserting himself after Guardiola transformation|
|Stanley Cup playoffs three stars: Blues beat Wild as Rangers, Oilers also advance|
|Grizzlies edge Spurs, Warriors rally|
|Cubs overcome Reds, Carrasco delivers|
|MLS Review: Dallas stay unbeaten, Union denied first win|
|Wenger compares Ramsey to Lampard|
|Warriors star Durant to miss game three|
|Blue Jays place Tulowitzki on 10-day DL|
|Sane: Guardiola told me to play like Messi and Neymar|
|Sanchez almost at same level as Messi – Guardiola lauds Arsenal star|
|Kerr will not coach Warriors in game three|
|Chappell grabs Texas lead heading into final round|
|Simeone hails clinical Atletico after seeing off Espanyol|
|Pochettino looks to bright future for Tottenham despite Chelsea woe|
|We threw away our credibility - Pioli slams Inter after hapless second-half showing|
|Bomb scare has helped pull Borussia Dortmund´s squad together, claims Tuchel|
|Amir takes five on rainy day in Jamaica|
|Chelsea´s unsung heroes win Conte praise after Wembley win|
22 de abril 2017
|Sporting CP 1 Benfica 1: Lindelof cancels out Silva penalty|
|Czech Republic and Switzerland hit back to level Fed Cup semi-finals|
|Burns night as Gloucester reach Challenge Cup final|
|Marquez beats Vinales to Austin pole|
|Hodge rescues Rebels at Sharks, Bulls beat Cheetahs|
|Fiorentina 5 Inter 4: Icardi hat-trick not enough for hapless Inter|
|Conte flummoxed by Chelsea schedule|
|Atletico star Griezmann brings up 100 goals in LaLiga|
|Espanyol 0 Atletico Madrid 1: Griezmann makes the difference with landmark goal|
|Montpellier hammer Racing to go second|
|Emery satisfied as win sends PSG top|
|ITF president slams Nastase abuse after Konta is reduced to tears|
|Burki not angry with mistakes in Dortmund win|
|Silva: Ten-man Hull deserved vital win|
|Mumbai march on with win over Daredevils|
|Pochettino: Tottenham dominated Chelsea|
|Matic: Wembley thunderbolt not my best goal|
|Double vision for Chelsea as super Spurs are slain|
|Ronaldo not the most naturally talented player - Fortune|
|Borussia Monchengladbach 2 Borussia Dortmund 3: Guerreiro settles Bundesliga thriller|
|Chelsea 4 Tottenham 2: Matic stunner seals Blues´ progress to FA Cup final|
|Buffon rested for Juventus-Genoa|
|We played like 11 lions! - Bilic buoyed by West Ham´s grit|
|´Proud´ Swansea boss Clement issues survival rallying call|
|Howe warns Bournemouth not safe yet|
|Championship Review: Newcastle United on brink of promotion, Fulham thump play-off rivals Huddersfie|
|´Significant ligament damage´ set to end Ibrahimovic´s season|
|Bayern defender Alaba a doubt for Pokal semi|
|Paris Saint-Germain 2 Montpellier 0: Cavani and Di Maria send Emery´s men top|
|Expansive Saracens overcome valiant Munster for final spot|
|Nadal reaches Monte Carlo final after umpire howler rattles Goffin|