Top seed Iga Swiatek is through to the quarter-finals of the Madrid Open thanks to a dominant straight-set victory against Spain's Sara Sorribes Tormo.

The world number one was broken in the first game of the match but then won the next 12 in a row for a 6-1 6-0 triumph.

Swiatek, 22, needed just 68 minutes to seal the win and will now play 11th seed Beatriz Haddad Maia of Brazil in the last eight.

Haddad Maia beat fifth seed Maria Sakkari of Greece 6-4 6-4.

Tunisia's Ons Jabeur also progressed as she defeated ninth seed Jelena Ostapenko of Latvia in straight sets.

Jabeur, who is seeded eighth in Madrid, made the perfect start as she broke in the first game on the way to a 6-0 6-4 win.