George Livingston “Leif” Shiras – born August 21, 1959 – is a former professional tennis player from the United States and now a tennis journalist.
During his career as a player, Shiras reached one top-level final – at the Queen’s Club Championships in 1984, where he lost to John McEnroe 1–6, 6–3, 2–6 (having beaten Ivan Lendl in the first round).
His best singles performance at a Grand Slam event came at Wimbledon in 1989, where he reached the fourth round. His career-high ranking was World No. 31 in singles (in 1984), and World No. 57 in doubles in (in 1988).
Shiras retired from the professional tour in 1990. Since then, he has worked as a tennis journalist, primarily as a commentator for the Tennis Channel, Sky Sports and Fox Sports.