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- 年龄: 26 (25.04.1990)
- 出生地: Warstein, Germany
- 常住地: Warstein, Germany
- 身高: 6'5" (196 厘米)
- 体重: 192 磅 (87 千克)
- 比赛: 右手持拍
- 转入职业年份: 2009
- 教练: Carsten Arriens
- 站点: http://www.janlennardstruff.com/
2014 -- The German finished in Top 100 for 1st time at year-end high No. 59, climbing 51 spots from previous season (No. 110). Won a personal-best 15 tour-level matches...Advanced to 1st 3 ATP World Tour SFs in Marseille in February (l. to Tsonga), Munich in May (l. to Fognini) and Metz in September (l. to eventual champion Goffin)...Rose to a career-high No. 46 on October 27 after reaching QF in Vienna (l. to Murray)...Contested all 4 Grand Slams for 1st time, reaching 2R at Roland Garros (l. to Monfils) and US Open (l. to Isner). Fell in 1R at Australian Open (l. to Youzhny) and Wimbledon (l. to Kubot)...In Challenger play, ended 8-match losing streak in finals, winning 1st title at that level in Heilbronn II in May. Was also runner-up in Bergamo, Italy in February (l. to Bolelli) and Szczecin, Poland in September (l. to Brown)... Compiled records of 9-8 on hard, 5-6 on clay and 1-3 on grass. Went 0-1 vs. Top 10 opponents and earned a career-high $452,641...
2013 -- The German finished a year-end best No. 110 in his 1st full year on ATP World Tour after reaching a career-high No. 95 in August...Compiled his best results on Challenger circuit with a 27-17 match record, highlighted by back-to-back finals at Heilbronn (l. to Berrer) and Bergamo (l. to Przysiezny) in February. Also runner-up at Geneva (l. to Jaziri). Has a 0-7 record in Challenger finals...In Grand Slam play (1-3), won his 1st career Slam match at Wimbledon (d. Kavcic in 1R, l. to Chardy) as a qualifier. Lost 1R at Roland Garros (l. to Donskoy) as a qualifier and US Open (l. to Rufin), failed to qualify for Australian Open (l. to Brugues-Davi in final round)...Reached 2R at Hamburg (d. F. Lopez) and Båstad (d. Verdasco), best ATP results...Compiled records of 2-4 on clay, 1-2 on grass, and 1-3 on hard. Earned a career-high $244,040...
2012 -- Finished in the Top 200 for first time in career, highlighted by reaching 2 Challenger finals at Madrid (l. to Gimeno-Traver) and Loughborough (l. to Donskoy), also won 4 Futures titles…
2011 -- Reached Challenger finals at Alphen aan den Rijn (l. to Sijsling) and Furth (l. to Sousa), won 3 Futures titles on home soil 4 overall…
2010 -- Went 1-1 in Futures finals…
On 25 March, saved three match points in three-set win over Becker in ATP World Tour Masters 1000 Miami 1R...
On 7 April, failed to convert one match point in the 10th game of the 76(5) third set loss versus Haider-Maurer in Casablanca 1R; saved three match points in the 12th game of the second set...