19-time Grand Slam champion Roger Federer will face Germany’s Alexander Zverev in a hotly anticipated clash at the ATP Finals in London today.

Zverev, who made his debut at the infamous tournament on Sunday, made his mark by beating US Open Champion, Marin Cilic 6-4, 3-6, 6-4.

Federer marked his 15th appearance at the tournament by breezing past American Jack Sock, beating him in straight sets 6-4, 7-6.

A win could mean qualification to the semi-finals for Federer depending on the result of Sock and Cilic’s match during the afternoon session today. The Swiss would need a win over the World Number 3 and a victory for Cilic to advance.

Class Act

Federer has had a tremendous year so far, winning the Australian Open back in January, followed by a win at a Wimbledon over the summer.

Zverev has had an equally impressive year, reaching a career high in the world rankings this month and clinching his first Masters title by winning the Italian Open.

Speaking at a press conference, the 20-year-old German had nothing but praise for Federer by admiring his perfect form this season, saying “I think Roger and Rafa have been playing the best tennis of their lives this year. I really think that, especially Roger”.

Their last clash at the Montreal Masters in August ended in victory for Zverev but with Federer in faultless physical form and dominant on hard-surface courts, it could be anybody’s game.