| Guillermo Stevens | |
| Fullname: | Guillermo Stevens Sierra |
| Birth Date: | 22 April 1960 |
| Birth Place: | Veracruz, Mexico |
| Height: | 5 ft 11 in |
| Singlesrecord: | 0–1 |
| Highestsinglesranking: | No. 302 (22 Dec 1980) |
| Wimbledonresult: | Q1 (1983) |
| Doublesrecord: | 1–4 |
| Highestdoublesranking: | No. 345 (19 Nov 1984) |
| Wimbledondoublesresult: | Q1 (1983) |
Guillermo Stevens Sierra (born 22 April 1960) is a Mexican tennis coach and former professional player. He is also known by his nickname "Memo".[1]
Stevens was a collegiate tennis player for UT Austin prior to joining the professional tour, where he attained a career high ranking of 302 in the world.[2] He was runner-up at the inaugural San Luis Potosí Challenger in 1980, qualified for the main draw of the 1982 Bordeaux Open and featured in the qualifiers for the 1983 Wimbledon Championships.[3]