Forget tennis.. I say ANY sport in the Olympics is surely a doddle, compared to what poor old Hercules had to labour through:
1.Slay the Nemean Lion.
2.Slay the nine-headed Lernaean Hydra.
3.Capture the Golden Hind of Artemis.
4.Capture the Erymanthian Boar.
5.Clean the Augean stables in a single day.
6.Slay the Stymphalian Birds.
7.Capture the Cretan Bull.
8.Steal the Mares of Diomedes.
9.Obtain the girdle of Hippolyta, Queen of the Amazons.
10.Obtain the cattle of the monster Geryon.
11.Steal the apples of the Hesperides (He had the help of Atlas to pick them after Hercules had slain Ladon).
12.Capture and bring back Cerberus.
Now THAT deserves a Gold Medal, don't you think?