Roger Federer took the honours in the much-anticipated mixed doubles clash with fellow great Serena Williams in what the latter described as the "match of her career" at the Hopman Cup in Perth, Australia.
Angelique Kerber and Alexander Zverev both won their singles matches against Spain to give Germany a winning start to their Hopman Cup campaign.
It appears that the 37-year old Swiss player has started to think about life beyond tennis, as he reveals plans to travel extensively and take a number of "road trips".
Roger Federer's bid for a 100th career title is on track after beating Fabio Fognini 6-4, 6-3 on Thursday to reach the Paris Masters quarterfinals.
Roger Federer is out of the US Open after losing to John Millman. It was Federer's first loss against a player outside the top 50.
Five-time champion Roger Federer beat Australian Nick Kyrgios in three sets and reached the US Open last 16 while Slovakia's Dominika Cibulkova took out Wimbledon champion Angelique Kerber.
The last time the Swiss tennis star lifted the trophy was back in 2008 and he he has twice made the finals since, but the title at Flushing Meadows has eluded him ever since.
Djokovic, who had come off second best in five previous Cincinnati finals, defeated seven-time winner Roger Federer 6-4, 6-4 in the final.
The 21-year-old German won his third title of the year and the ninth of his career by defeating Australian teen Alex De Minaur 6-2, 6-4 in the 50th edition of the US Open tuneup event.
South Africa's Kevin Anderson became the first South African to reach the Wimbledon final in 97 years after triumphing over John Isner in the tournament's second longest match.
South African Kevin Anderson's hopes looked forlorn as Federer skipped through the opening two sets on Court One with his usual panache, but he turned the match on its head to cause the biggest shock yet in a tournament full of upsets.
Tennis fans are dreaming of another final between Rafael Nadal and Roger Federer as the two have stormed into the Wimbledon quarterfinals on 'manic Monday', when all 16 fourth-round singles matches are played.
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