Zverev beats Djokovic in 2 sets to win ATP Finals title

Having failed to take advantage of five championship points during the first-to-10 match tiebreaker, Bryan and Sock then had to save one against their French opponents before finally closing out victory.

"It was a hell of a match," Bryan said.

The 40-year-old Bryan has now won the tournament five times. He won four times with his usual partner — and brother — Bob, who has been out with an injured hip since May.

Sock and Bryan have dominated since teaming up, winning Wimbledon and the US Open before finishing their season in style in London.

"It's been a hell of a ride," Bryan said. "This could be our last hoorah because Bob's training back in Florida." 

Associated Press