[1] Nisker made his ATP Tour main draw debut in doubles at the 2002 Canada Masters held on hard courts in Toronto.

Partnering up with compatriot Frank Dancevic, the pair received a wild card entry into the main doubles draw.

They pulled off an upset victory in the first round by defeating Andrew Florent and Chris Haggard in three sets 3–6, 7–6(7–5), 6–2.

[2] He competed at the 2003 Pan American Games held in Santo Domingo, Dominican Republic.

[3] Nisker reached his only career singles final in June 2002 at the Canada F1 ITF Futures tournament in Mississauga, Ontario, resulting in a loss to Trace Fielding.