Who was Roger Federer's doubles partner when he won Olympic gold in 2008?

Roger Federer’s doubles partner when he won Olympic gold in 2008 was Stan Wawrinka. The Swiss pair captured the men’s doubles title at the Beijing Olympics, giving Switzerland its first Olympic tennis gold medal.

Federer and Wawrinka defeated Sweden’s Simon Aspelin and Thomas Johansson in the final, winning 6–3, 6–4, 6–7, 6–3. The match was held at the Olympic Green Tennis Centre on hard courts between 10 and 16 August 2008.

Federer entered Beijing as the reigning world No. 1 in singles, but he lost in the singles quarterfinals to James Blake. The doubles triumph therefore became the defining result of his Olympic campaign. Wawrinka, then a rising player, complemented Federer in a partnership that combined Federer’s attacking skill with Wawrinka’s power.

Federer and Wawrinka remained associated with Swiss tennis for years afterward, although Wawrinka’s best-known singles achievements came separately, including three Grand Slam titles. Federer never won Olympic singles gold; his 2008 doubles medal was his only Olympic gold.