Sultan Khalfan Al-Alawi (born March 16, 1977 in Qatar) is a former Qatari professional tennis player.
A top junior player in Qatar, runner-up of the International Junior Championships in 1994 and 1995, Khalfan was the most successful member of the Qatar Davis Cup team, playing 59 ties between 1993 and 2009 and compiling a 29–26 record in singles, 19–22 in doubles.
He appeared nine times in the Qatar Open draw between 1996 and 2007, losing each time in the first round.
Khalfan reached a career-high singles ranking of No.