Juan Martin Del Potro saved two match points en route to victory over Roger Federer at Indian Wells, ending the Swiss' ideal record in 2018 and clinching his first ATP Masters title at the BNP Paribas Open.
Swiss tennis great Roger Federer's two sets of twins - Myla and Charlene, eight, and Leo and Lenny, three, usually travel with him on tour.
Roger, who has won the Australian Open and the Rotterdam Open, took his record to 17-0 after beating Boran Coric on Saturday, which is the longest winning start to a year in his glittering career.
Del Potro arrived in the Californian desert on the back of a title win in Acapulco but had far from a smooth ride against an agitated Federer, who simply would not give up on his quest for a sixth Indian Wells title. He added: "I feel frustrated that I let an opportunity like this go by".
An upset was on the cards when the speedy Coric used his ferocious backhand to take the first set off the Swiss, the first time defending champion Federer had dropped a set at Indian Wells in nine matches.
This is the 29-year-old Argentinian's second trip to the Indian Wells championship match.
"Most importantly, Juan Martin, well done, you deserved it, you were the better player", he said.
Federer clinched the match when Coric hit a shot wide. "It was tough for me to keep fighting in the third set but I survived when I broke his serve at 5-4, saving match point".
The two have met four times previous year.
"I was lucky in both sets with early breaks", Del Potro said.
"I'm still shaking", Del Potro said during the presentation.
In the second set, the normally mild-mannered Federer argued with the match umpire Fergus Murphy during a crucial tiebreak.
Based on the way Federer and Del Potro have played, including throughout Sunday's highly competitive and entertaining final, it wouldn't be a surprise to see them face off for another title in two weeks should they land on opposite sides of the draw. I think this is the worst part for me.
"I will try to play as good as I did here but then it's time for a break so my body can recover and then see what tournaments on clay I will play".
"Federer was just absolutely whacking the ball at him with all sorts of spin on it and Del Potro is just stepping out the way of it and middling it away for clean victor volleys".
This time it was del Potro's turn to have words with Murphy as the crowd refused to stay silent.
Prior to the BNP Paribas Open final, Federer had won five of the pair's last six matches going back to 2013. He escaped the danger by holding serve and eventually managed to level the match with a 10-8 win in the breaker.