Jan Mertl
| Country (sports) | Czech Republic |
|---|---|
| Residence | Teplice, Czech Republic |
| Born | 3 January 1982 Ústí nad Labem, Czechoslovakia |
| Height | 1.90 m (6 ft 3 in) |
| Turned pro | 2002 |
| Plays | Right-handed |
| Prize money | $610,165 |
| Singles | |
| Career record | 2–1 |
| Career titles | 0 |
| Highest ranking | No. 163 (23 July 2007) |
| Grand Slam singles results | |
| Australian Open | Q3 (2008, 2013) |
| French Open | Q2 (2012, 2014) |
| Wimbledon | Q3 (2015) |
| US Open | Q2 (2013, 2014, 2015) |
| Doubles | |
| Career record | 0–0 |
| Career titles | 0 |
| Highest ranking | No. 131 (11 June 2007) |
| Last updated on: 16 July 2023. | |
Jan Mertl (born 3 January 1982) is a Czech former tennis player who competed mainly on the ITF Futures Tour and ATP Challenger Tour. On 23 July 2007, he reached his highest ATP singles ranking of 163.
Mertl made his ATP main draw debut at 2016 Swiss Open Gstaad, defeating Yann Marti to score his first ATP-level win.
Mertl is the coach of Czech WTA player Markéta Vondroušová.