George Edward Bastl (born 1 April 1975) is a former professional tennis player from Switzerland.

The biggest win of Bastl's tennis career came in the second round of the 2002 Wimbledon Championships, where he caused one of the biggest upsets in Wimbledon and Grand Slam history by defeating seven-time champion Pete Sampras, winning in five sets by the score of 6–3, 6–2, 4–6, 3–6, 6–4.

Bastl had only been in the main draw of 2002 Wimbledon as a lucky loser, having previously lost to Alexander Waske in three straight sets in the final qualifying round at Roehampton.

Bastl teamed up with Roger Federer in the men's doubles at the US Open in 2002.

They got to the third round before being knocked out by Wayne Black and Kevin Ullyett.