Tournament top seed Bernard Tomic was given a scare before advancing to the quarter-finals of the Ecuador Open on Wednesday.
The world No.20 took the first set 6-3 against Roberto Carballes only to go down 6-2 in the next to the Spaniard, before recovering to win the deciding set 6-4.
Tomic, who was eliminated in the fourth round of the Australian Open by Britain's Andy Murray, will now meet tournament No.6 seed Paolo Lorenzi from Italy for a spot in the semi-finals.
Earlier third-seeded Thomaz Bellucci of Brazil defeated Spain's Albert Montanes 6-2 6-4 to reach the quarter-finals.
Bellucci will come up against No.8 Pablo Carreno Busta in the last eight.
The Spaniard defeated countryman Inigo Cervantes 6-7 (5) 7-6 (2) 6-2.
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