MATCH
| 12.01.09 | q 1 | Izak van der Merwe | Guillermo Lasso | 6-0, 6-1 |  Salinas Challenger | Hard |
MATCH STATS
Country
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Ecuador
31.03.85, 40 years
31.03.85, 40 years
Izak van der Merwe vs. Guillermo Lasso - head to head matches
| 12.01.09 | q 1 | Izak van der Merwe | Guillermo Lasso | 6-0, 6-1 | match details | Salinas Challenger | Hard |
Izak van der Merwe form & Guillermo Lasso form
Izak van der Merwe - last matches
 Leon Challenger - Hard | ||||
| 31.03.14 1st round | vs. Louk Sorensen | 1-6, 3-6 |  | match details |
 Rimouski Challenger - I. hard | ||||
| 17.03.14 1st round | vs. Daniel Cox | 3-6, 1-6 | | match details |
| Canada F2 - I. hard | ||||
| 10.03.14 2nd round | vs. Vincent Millot | 5-7, 6-3, 3-6 | | match details |
| 10.03.14 1st round | vs. Daniel Chu | 6-3, 6-4 |  | match details |
 Guangzhou Challenger - Hard | ||||
| 25.02.14 1st round | vs. Ze Zhang | 2-6, 4-6 | | match details |
 Kolkata Challenger - Hard | ||||
| 09.02.14 q 2 | vs. Liang-Chi Huang | 4-6, 7-65, 3-6 | | match details |
| 08.02.14 q 1 | vs. N. Vijay Sundar Prashanth | 6-2, 6-4 | | match details |
| Rimouski Challenger - I. hard | ||||
| 18.03.13 1st round | vs. Cedrik-Marcel Stebe | 3-4, - Izak van der Merwe - retired | | match details |
| Salinas Challenger - Clay | ||||
| 25.02.13 qual. | vs. Gonzalo Lama | 6-73, 6-74 | | match details |
| 24.02.13 q 2 | vs. Ivan Endara | 7-62, 6-3 | | match details |
| 23.02.13 q 1 | vs. Andres Cabezas | 6-1, 6-4 | | match details |
 San Jose - I. hard | ||||
| 09.02.13 q 1 | vs. Simon Stadler | 6-3, 2-6, 2-6 | | match details |
| Dallas Challenger - I. hard | ||||
| 05.02.13 1st round | vs. Marcelo Demoliner | 7-611, 4-6, 0-6 | | match details |
 Melbourne - Hard | ||||
| 09.01.13 q 1 | vs. Damir Dzumhur | 3-6, 4-6 | | match details |
 Auckland - Hard | ||||
| 05.01.13 q 1 | vs. Lukas Rosol | 4-6, 2-6 | | match details |
| Champaign Challenger - I. hard | ||||
| 14.11.12 2nd round | vs. Tim Smyczek | 2-6, 4-6 | | match details |
| 13.11.12 1st round | vs. Andrei Daescu | 6-2, 6-2 | | match details |
| Knoxville Challenger - I. hard | ||||
| 08.11.12 2nd round | vs. Tim Smyczek | 5-7, 5-7 | | match details |
| 06.11.12 1st round | vs. Michael Lammer | 6-1, 6-76, 6-4 | | match details |
| Charlottesville Challenger - I. hard | ||||
| 03.11.12 1/2 | vs. Denis Kudla | 4-6, 5-7 | | match details |
| 02.11.12 1/4 | vs. John-Patrick Smith | 4-6, 7-63, 6-4 | | match details |
| 01.11.12 2nd round | vs. Jack Sock | 6-3, 6-4 | | match details |
| 30.10.12 1st round | vs. Mac Styslinger | 6-3, 6-2 | | match details |
| Tiburon Challenger - Hard | ||||
| 11.10.12 2nd round | vs. Rhyne Williams | 2-6, 3-6 | | match details |
| 08.10.12 1st round | vs. Matteo Viola | 6-3, 6-4 | | match details |
| Sacramento Challenger - Hard | ||||
| 03.10.12 2nd round | vs. Mischa Zverev | 6-75, 3-6 | | match details |
| 01.10.12 1st round | vs. Tim Smyczek | 6-3, 6-2 | | match details |
 Izmir Challenger - Hard | ||||
| 19.09.12 1st round | vs. Vishnu Vardhan | 4-6, 2-6 | | match details |
| Davis Cup - Hard | ||||
| 16.09.12 | vs. Milos Raonic | 2-6, 2-6, 4-6 | | match details |
| 14.09.12 Rubber 1 | vs. Vasek Pospisil | 3-6, 4-6, 4-6 | | match details |
Guillermo Lasso - last matches
| Salinas Challenger - Hard | ||||
| 12.01.09 q 1 | vs. Izak van der Merwe | 0-6, 1-6 | | match details |
| Salinas - Hard | ||||
| 10.03.08 q 1 | vs. Federico Torresi | 0-6, 0-6 | | match details |
| Manta - Hard | ||||
| 09.08.04 qual. | vs. Jose Ycaza | 3-6, 0-6 | | match details |
| 09.08.04 q 2 | vs. Carlos Velez | 6-2, 6-3 | | match details |