On Tuesday, Roger Federer lifted the spirits at the O2 arena by winning over young pretender Alexander Zverev, and made sure to stay on the course for his seventh end-of-season crown at ATP World Tour Finals.

Rafael Nadal lost his chance to ATP Finals because of injuries, Novak Djokovic and Andy Murray were also absent because of injuries – leaving Federer the only member from ‘big-four’ tennis men. So to make sure he stays for the finale, the 19-time Grand Slam winner defeated young German player Alexander Zverev by 7-6 (6), 5-7, 6-1 on Tuesday. The match at O2 arena began on Tuesday, with a scratchy service from both players – but soon it grooved in a tight first set that saw no breaks of serve, though Zverev had to fend off two set points in the 12th game to force a tie-break.

After an opening set dominated by serve went to a tiebreak, Federer came from 4-0 down and saved a set point to take the lead. Federer tightened his grip on the 20-year-old opponent as Zverev made double faults, but he soon picked up during Federer’s first serve – giving him a tough match. But soon after that, it was all Federer and his extreme experience. 16-years older than Zverev, Federer enjoys this court and the way it plays, and his experience on it against a tournament debutant helped him pass a thorough examination of his game.

His final round-robin contest in the Boris Becker group will come Thursday against Marin Cilic, who earlier in the day was eliminated from the semi-finals by Jack Sock 5-7, 6-2, 7-6 (4). Considering that Federer is the only one from the big-four at ATP, and that the dream clash of Nadal and Federer has been kicked off to sides – winning the season cup should be a clear chance for the Swiss master-player which will help him in getting to No. 1 from the second position.