Britain’s Andy Murray won his first Grand Slam match since becoming world number one but was given a stern test by world number 95 Illya Marchenko.

 Wimbledon champion Andy, made a nervy start and lost the first game with three double faults and a forehand error, but took control to serve for the set at 5-3.

However, Marchenko broke the Brit again to draw level, only for Murray to raise his intensity and take the set after 55 minutes.

Murray became increasingly frustrated in the second set, as his opponent grew in confidence. The Ukrainian, 29, hit a series of powerful forehands and deft volleys to take the lead in the set. Murray had to fight hard to force a tie-break, but once again the top seed did enough when it mattered to win the set after a marathon 76 minutes in hot conditions.

The gruelling effort seemed to affect Marchenko in the third set and Murray took advantage to win it without any complications.

He faces Russia’s Andrey Rublev in round two.