Dan Evans claimed his first ATP Tour win on clay at the Barcelona Open as fellow Briton Kyle Edmund also progressed to the second round.
World number 43 Evans took a final set tie-break against Thiago Monteiro of Brazil to triumph 6-7 (4) 6-2 7-6 (2).
His only two previous wins on the surface at tour level came in Davis Cup dead rubbers.
Edmund, the World number 42, brushed aside Frenchman Jeremy Chardy 6-3 6-4 and faces Austria's Dominic Thiem next.
Evans, 26, will play Mischa Zverev, who beat Andy Murray at this year's Australian Open, in the second round.