Mattias Hellstrom
Mattias Hellstrom is a former professional tennis player from Sweden.
Tennis career
Juniors
Hellstrom had a promising junior career, reaching the final at the Australian Open Boys' Singles in 1996, losing to fellow Swede Bjorn Rehnquist. He reached a singles high of No. 8 in the world on the ITF Junior rankings at the end of 1996.Pro tour
Hellstrom made his ATP singles main draw debut at the 2004 Swedish Open as a qualifier, losing to world number 42, Irakli Labadze.The Swede mainly participated on the Futures circuit, reaching three finals and winning two titles. Hellstrom also won three doubles titles on the Futures circuit, all in partnership with compatriot, Fredrik Lovén.
Hellstrom has a career high ATP singles ranking of 366 achieved on 15 October 2001 and a career high ATP doubles ranking of 422 achieved on 20 October 1997.
Junior Grand Slam finals
Singles: 1 runner-up
ITF Futures Titles
Singles: (2)
Doubles: (3)
| No. | Date | Tournament | Surface | Partner | Opponents | Score |
| 1. | Bramhall, Great Britain F1 | Carpet |  Fredrik Loven |  Marc Merry Mose Navarra | 7–6, 6–1 | |
| 2. | Gothenburg, Sweden F1 | Hard | Fredrik Loven |  Mark Hlawaty Simon Stadler | 6–4, 6–4 | |
| 3. | Gothenburg, Sweden F2 | Hard | Fredrik Loven |  Lassi Ketola Janne Ojala | 6–3, 7–5 |