2010-11: All-American in singles and doubles ... All-Pac-10 First Team honoree ... Pac-10 All-Academic Honorable Mention selection ... advanced to quarterfinals of NCAA Singles Championship ... earned a final national singles ranking of No. 6 ... led team with a 36-11 overall record ... 19-7 in duals, playing all of his matches at the No. 1 spot ... 17-4 in tournament matches ... 24-9 against nationally-ranked opponents ... 6-2 in three-set matches ... highest-ranked victory was a 6-4, 6-2 rout of No. 5 Michael Shabaz from Virginia in the NCAA Tournament team portion ... pieced together a season-high 12-match winning streak from Apr. 3-Apr. 30 ... won all four of his matches at the No. 1 spot during NCAA Tournament team play ... reached semifinals of the D'Novo/ITA All-American Championships in October ... captured the singles title at the Sherwood Cup in mid-January, repeating as the tourney champion ... earned a runner-up finish at the Pac-10 Championships in late April ... in doubles, partnered exclusively with Ryan Thacher for team-best records overall (43-8) and in duals (19-3), while finishing 16-7 against nationally-ranked foes ... Klahn and Thacher earned a final national doubles ranking of No. 4 ... duo was named Pac-10 Doubles Team of the Year ... runner-up finish at NCAA Doubles Championships, falling in the title match to Texas A&M's Jeff Dadamo and Austin Krajicek 7-6 (4), 6-3 ... first Stanford doubles team to reach NCAA Doubles Championships final since 2004 ... pocketed three tournament doubles titles during the year (Pacific Coast Doubles in early March, Sherwood Cup in mid-January and ITA National Indoor Championships consolation in early November) ... nearly captured a fourth title, reached semifinals of the Pac-10 Championships ... registered two lengthy winning streaks during the year, winning 15 in a row from Nov. 4-Feb. 19 and Mar. 4-Apr. 29.

2009-10: All-American in singles and doubles ... All-Pac-10 First Team selection ... Pac-10 All-Academic Honorable Mention ... defeated Louisville's Austen Childs 6-1, 6-2 to become NCAA Singles champion, capturing Stanford's 14th collegiate singles title and first since 2000 ... nearly captured the NCAA Doubles crown as well, advancing to the semifinals ... finished season with a national singles ranking of No. 4 ... tabbed one of eight No. 9-16 seeds in the NCAA Singles Championship draw ... won four of his six matches in the tournament and reached the national title match after knocking off the tournament's top seed and country's No. 2-ranked player in Henrique Cunha of Duke 6-2, 6-2 ... notched two different season-best nine-match winning streaks, the second of which closed out the year ... led team in victories with a 41-8 overall record while also going 17-5 in duals and playing all his matches at the No. 1 position ... 23-8 against nationally-ranked opponents ... 15-6 against Pac-10 foes ... 12-2 in home matches ... 7-4 in three-set matches ... posted a 3-2 mark against players ranked in the top-10 at the time of the match ... participated in three other singles championship matches (ITA Northwest Regionals on Oct. 27- defeated California's Pedro Zerbini 7-5, 6-3, Sherwood Cup on Jan. 17- defeated Baylor's Denes Lukcas 6-3, 6-4 and Pac-10 Championship on Apr. 25- lost to USC's Robert Farah 6-2, 7-6 (5) ... opened the year by winning 18 of his first 20 matches ... partnered exclusively with Ryan Thacher in doubles, as the duo finished 40-8 overall, 17-3 in duals, 14-5 against Pac-10 opponents, 13-6 against nationally-ranked foes and 11-0 in home matches ... received a final national ranking of No. 4 ... Stanford's top duo lost back-to-back contests only once and recorded winning streaks of 10 and 11 matches, respectively ... the dominant pairing claimed two doubles titles on the year, taking home the hardware at the ITA Northwest Regional Championships and ITA National Indoor Championships.

2008-09: ITA National Rookie of the Year ... Pac-10 Freshman of the Year ... All-Pac-10 First Team selection ... became just the fourth player in school history to claim both the Pac-10 Singles and Doubles Championships in the same year ... led team with an overall record of 35-9, playing mainly at the top two spots of the lineup ... team-best 20-5 in dual matches with a 7-1 mark at the No.1 position and 13-4 record at the No. 2 spot ... 19-8 against nationally-ranked opponents ...finished with a national ranking of No. 32 ... totaled two different 10-match winning streaks on the year, including a season-best 11-match winning streak from Apr. 8-May 8 ... highest-ranked victory was a 6-2, 7-5 win over No. 7 Robert Farah of USC on Apr. 25 ... claimed the Pac-10 singles title with five consecutive straight-set victories ... dropped a hard-fought, three-set decision to teammate Alex Clayton in the final of the ITA Regional Championship ... in his first career match, picked up a 6-4, 6-4 win against Kentucky's Brad Cox at the ITA All-American Championships ... in doubles, teamed with Ryan Thacher for a final No. 28 national ranking and an 11-4 record (7-4 duals) ... the duo also claimed its first title, winning the Pac-10 doubles crown ... advanced to the round of 32 at the ITA All-American Championships ... advanced to the doubles semifinals of the ITA Regional Championships with Clayton.

Prior to Stanford: Achieved his top USTA Boys' 18s ranking of No. 1 in 2008 ... career-high ranking in the International Tennis Federation is No. 14 ... reached the third round of the 2008 Junior Australian Open, Junior Wimbledon Championships, and Junior U.S. Open ... captured both the singles and doubles B18s titles at the 2008 USTA International Spring Championships and 2008 Winter Nationals and the doubles title at Melbourne's Optus Nottinghill ITF Championships... a finalist at the 2008 Kalamazoo B18s doubles and the Optus Nottinghill ITF B18s singles ... won the 2006 USTA Nationals (Kalamazoo) B16s doubles and was a member of the Junior Davis Cup squad that competed in Barcelona that same year.

Personal: Parents are Dennis and Nancy Klahn ... mother, Nancy, played tennis at Iowa.