By Shrivathsa Sridhar LONDON (Reuters) -Seven-time Wimbledon champion Novak Djokovic was made to work hard after a strong start as he began his bid for a 25th Grand Slam title by beating unseeded Frenchman Alexandre Muller 6-1 6-7(7) 6-2 6-2 to reach the second round on Tuesday.

On Tuesday, Novak Djokovic opened his Wimbledon campaign with a 6-1, 6-7, 6-2, 6-2 win over Alexandre Muller. While the scoreline suggests a clear advantage for the Serbian star, the World No. 6 struggled at times during the match, which affected his overall performance.

Novak Djokovic overcomes physical issues to join Jannik Sinner in the Wimbledon second round, but third seed Alexander Zverev is out.