Marek Semjan
Marek Semjan is a Slovak tennis player playing on the ATP Challenger Tour. On 30 August 2010, he reached his highest ATP singles ranking of 218.
Career
He won over top seed Fernando Verdasco at the 2012 UniCredit Czech Open in Prostějov in three sets 6–4, 6–7, 6–4.Challenger finals
Singles: 2 (0–2)
| Outcome | No. | Date | Tournament | Surface | Opponent in the final | Score | |||||||||||||
| Runner-up | 1. | 1 August 2010 | Saransk, Russia | Clay |  Doubles: 2 (2–0)
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