ATP Finals Day 3 schedule: Order of play as Federer takes on Zverev
Federer will take on Zverev (Picture: Getty)

Roger Federer will take on Alexander Zverev in one of the most hotly-anticipated clashes at the ATP Finals on Tuesday, where qualification for the semi-finals will be on the line.

Both men can secure their spots in the semi-finals with a win – and if the match between Marin Cilic and Jack Sock goes their way – after securing first day

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