1 of 9
Defending champion Lleyton Hewitt is first on Centre Court and takes the opening set with ease against Ivo Karlovic

2 of 9
Despite a confident opening to the second set, Hewitt wobbles on his serve and Karlovic grows in confidence

3 of 9
Karlovic keeps his nerve in the second set tie-break, rattling down a 133mph serve before taking the set 7-6 (7-5)

4 of 9
As his Croatian opponent gets into his stride, Hewitt is made to fight for every point and struggles in the third set

5 of 9
The Croatian proves too strong for Hewitt again and takes the third set 6-3 to put the champion in real trouble

6 of 9
Hewitt cannot find an answer to the imposing Croat's serve and struggles in the fourth set

7 of 9
Karlovic keeps his nerve to claim a sensational 1-6 7-6 6-3 6-4 victory in his first-ever Grand Slam match

8 of 9
The unheralded Croatian laps up the adulation of the Centre Court crowd after humbling Hewitt

9 of 9
The young Australian is left to reflect on being the victim of one of Wimbledon's greatest upsets