Jack Sock's doubles success could be what's kept his career going following a poor singles season.
Sock reached a career-high of No. 8 in singles in 2017, thanks in large part to his title run the Paris Masters, who also qualified him for the ATP Finals. Bu the American did not win back-to-back matches again until this year's Paris Masters, and fell to No. 106 in the rankings when his championship points dropped off after the indoor Masters event.
But Sock managed to return to the ATP Finals, in doubles, with Mike Bryan. The partnership led to doubles titles at Wimbledon (the second of Sock's career), the US Open and now the ATP Finals.
"Without some of the success we've had, it would have been a very tough year," Sock told press at the ATP Finals. "I think without the doubles success, I don't know [what] I'd feel about the sport. I've been in some low places this year. Guys like Mike, being on the court, my team, his team, my family, my friends, have tried to keep positive energy around me.
"So, yeah, I'll look back and be disappointed on one side, extremely proud and happy on the other side of it."
Coming into the week, the 26-year-old had acknowledged
"I think obviously the experience is second to none," said Sock. I mean, Mike, along with Bob, have spent a lot of time around both now, they've been through everything I'm sure. The highs, the lows, they've been to every tournament, traveled everywhere, done it all.
"Just trying to take away as much as I can, as much as possible. But probably more than anything, positivity, energy. They're consummate professionals. It will probably help my career a lot."
Bob Bryan plans to return to doubles competition alongside Mike next season. That will allow Sock to concentrate more on singles again, though he plans to still occasionally play doubles.