Tau Luu (1944—1999), formerly Lưu Hoàng Đức, was a Vietnamese-born tennis player who immigrated to Hong Kong.

During the 1960s, Luu competed for the South Vietnam Davis Cup team and featured in the country's first ever tie in 1964.

The South Vietnamese however withdrew from the final against Japan and Luu didn't appear in the Davis Cup again, having fled to Hong Kong while returning from Seoul.

When he began competing on the local tennis scene, suspicion was raised that he was the former South Vietnamese player, but nothing could be proved.

In addition he also twice won the Hong Kong National Grass Court Tennis Championships and was a three-time winner of the SCAA Open.