Ever wondered what is the reason behind Roger Federer’s continues success on court? Yes, his incredible skills do matter, but there’s more to it: his wife, Mirka.

Following Federer’s 7-6 6-4 6-4 win over Germany’s Mischa Zverev in the third round of Wimbledon, the Swiss superstar heaped praise on his wife.

And if you’re wondering until when will Federer go on; well, it’s all up to his wife, a former tennis player herself.

“Without her I couldn’t do it. If she said, you know, I don’t want to travel no more, I’ll say, Okay, my career is over. It’s as simple as that,” the 18-time Grand Slam champion said.

He added: “So she’s the key to a lot of this. But she’s happy to be doing it, not on a weekly basis just because the travelling gets too much with the four (kids).”

Meanwhile, Federer, the No. 3 seed, is scheduled to square off against 13th-seeded Bulgarian Grigor Dimitrov for a place in the quarter-finals.