British number one Johanna Konta battled her way past Aliaksandra Sasnovich in three sets in the second round of the Miami Open.
Konta won the first set but, despite being 4-2 up in the second, lost it on a tie-break before coming through 6-2 6-7 (7-5) 6-4 against the Belarussian.
The 25-year-old, ranked 11th in the world, will now play France's Pauline Parmentier, the world number 57.
Fifth seed Rafael Nadal beat Israel's Dudi Sela 6-3 6-4 in the men's draw.
The 30-year-old Spaniard broke his opponent in the fourth game in their second-round match before going on to claim the first set in 35 minutes.