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 kicked off his 20th Wimbledon with a 6-1, 6-7, 6-2, 6-2 victory over Alexandre Muller in three hours and 19 minutes on Centre Court. The veteran played well in sets he won and notched his 98th Wimbledon triumph, moving closer to a massive milestone.