Alexandre Sidorenko (born 18 February 1988) is a French tennis player. He has a career-high singles ranking of World No. 145, achieved in May 2009. His main achievement is to have won the Boys' Singles title at the 2006 Australian Open.
Alexandre Sidorenko has only played in three major singles tournaments at professional level and has lost on all three occasions. In 2005 he was defeated by Evgeny Korolev in the first round of the ATP tour Marseille Open (2-6, 6-4, 6-1). He lost in the first round of the 2007 French Open against Werner Eschauer as a wildcard 6-3, 3-6, 6-3, 5-4 (retired). In 2008 he lost to Younes El Aynaoui in the first round of the Munich Open in Germany.
He has regularly competed on the Challenger and Futures tour circuit. He has reached the final of four Futures tournaments, all in France; in two of these he was victorious (France F12 in September 2006 and France F8 in June 2006).