Jan Hernych (born 7 July 1979) is a retired professional male tennis player from Czech Republic. Born in Prague, he turned pro in 1998 and achieved his career-high singles ranking of World No. 59 in April 2009. He won one doubles title and was runner-up in 's-Hertogenbosch in 2006.
Hernych has reached 25 singles finals in tenure as a professional tennis player, with his first final coming in 1998 and his most recent being in 2016, a span of almost twenty years. He has a record of 12 wins and 13 losses, including an 0-1 record in ATP Tour-level finals and 8-8 in Challenger finals.
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W-L) win-loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.