Igor Sijsling (Dutch pronunciation: ['ig?r 's?i?sl??]; born 18 August 1987) is a Dutch professional tennis player.
He is coached by Dennis Schenk.
Sijsling reached his career-high ATP singles ranking of World No.
52 on 17 February 2014.
His biggest accomplishment is reaching the final of Australian Open Doubles with countryman Robin Haase in 2013, where they lost to the Bryan Brothers.
In singles, he reached the third round of the 2013 Wimbledon Championships and has victories over top players including Jo-Wilfried Tsonga, Milos Raonic and Mikhail Youzhny.