Henin enters Miami semis

Justine Henin celebrates after defeating Caroline Wozniacki at the Sony Ericsson Open in Key Biscayne.

Justine Henin has advanced to the semifinals of the Sony Ericsson Open by beating No. 2-seeded Caroline Wozniacki 6-7 (5), 6-3, 6-4.

Henin lost only two of 22 service points in the final set on Wednesday, closing out the 2-hour, 45-minute match with a love game. Her play steadied after she committed 31 unforced errors in the opening set.

The unseeded Henin, who received a wild card entry, is mounting a comeback this year after a 20-month retirement. The seven-time Grand Slam champion improved to 16-3 in 2010 and will move into the top 30 in next week’s rankings.

Henin’s best finish at Key Biscayne was in 2007, when she lost to Serena Williams in the final.