Brazilian teenager Joao Fonseca overcame Spain's Jaume Munar 7-6 (7/4), 7-5 in Basel on Saturday to advance to the second final of his career.

The 19-year-old is seeking to add to his breakthrough victory in Buenos Aires in February.

Fonseca will play Alejandro Davidovich Fokina on Sunday.

The Spaniard was leading 7-6 (7/4), 3-1 when his French opponent Ugo Humbert followed the advice of coach Jeremy Chardy and withdrew with a back injury.

Chardy told Humbert, who had taken a medical time out in the third game and was struggling to serve, to stop if he was in "too much pain".

"It's clear you can't play now," Chardy said.