Colombian, Robert Farah, ranked world number one in men’s doubles, has withdrawn from the Australian Open for personal reasons.

Canada-born Farah won Wimbledon and the U.S. Open doubles titles with long-time partner and fellow Colombian Juan Sebastian Cabal.

The pair, who made the 2018 doubles final at Melbourne Park and were awarded the ATP’s doubles team of the year in 2019, had already pulled out of this week’s Adelaide International warmup event.

A Tennis Australia spokeswoman said Farah’s decision to pull out was not injury related. She added Cabal was expected to remain in Melbourne and play in the doubles with another partner.

The Australian Open starts on Monday.