The 25-year-old American Jack Sock (ATP-9), that Sunday in his first match multiple had to recognize in the Swiss Roger Federer (ATP 2), Tuesday, his chances of a place in the semi-finals of the ATP World Tour Finals cool held by the Croatian Marin Cilic (ATP-5) in 2 hours and 28 minutes with 5-7, 6-2 and 7-6 (7/4) to beat.
For Cilic it is the second defeat. Sunday, he lost, also in three sets the German Alexander Zverev (ATP-3). In the other match of the group “Boris Becker” takes Federer the sat night in the O2 Arena in London against Zverev. If Federer which party wins, has his first ticket for the semifinals for the bite. Cilic should hope for a win of Zverev to have a chance to win a place in the final four.