We take a look at the best first-round matches at the Australian Open, including Venus Williams' meeting with Coco Gauff.
Fernando Verdasco had won all four matches against Dominic Thiem but his dominance of the Austrian ended in Vienna on Thursday.
Former world number one Andy Murray was pushed all the way by Marius Copil before moving into the last four in Antwerp.
Daniil Medvedev decided not to chase a seventh straight final due to fatigue but Karen Khachanov thrilled fans at the Kremlin Cup in Moscow.
Former world number one Andy Murray recorded a straight-sets win for just the second time since August at the European Open in Antwerp.
Dominic Thiem is into the China Open semi-finals after beating Andy Murray in the Brit's first last-eight singles clash of the year.
Alexander Zverev has won just one title this season, a poor return by his recent standards, but he sped into the China Open last eight.
Denis Shapovalov was untroubled by Tennys Sandgren in the Winston-Salem Open second round.
Stan Wawrinka prevailed in a topsy-turvy battle with Grigor Dimitrov, while Novak Djokovic and Roger Federer made it through to the last 16.
Novak Djokovic – playing for the first time since winning Wimbledon – claimed a 7-5 6-1 victory over Sam Querrey on Tuesday.