Roberto Bautista Agut put Spain 1-0 ahead in their Davis Cup final against Canada with an emotional victory over Felix Auger-Aliassime in Madrid.
Bautista Agut, making a surprise return to the team following the death of his father on Thursday, beat the 19-year-old 7-6 (7-3) 6-3.
He was in tears after the win while addressing the jubilant crowd.
Spain will seal victory if world number one Rafael Nadal beats Denis Shapovalov in the second singles rubber.
Canada are in their first final, while Spain are chasing a sixth title.
The final is a best-of-three tie, where a doubles rubber would decide the outcome if the teams are level after the two singles matches.
Bautista Agut puts aside grief to deliver for Spain
Bautista Agut rushed home on Thursday after his father was taken ill and the Spanish federation later announced the player's dad had died.
But the world number nine returned to Madrid to watch his team-mates beat Great Britain in the semi-finals on Saturday before being recalled for the final.
The 31-year-old, whose mother died last year, pointed to the sky after claiming victory when Auger-Aliassime went wide on the first of three match points.
"It was very special feeling on the court and I just could go out and try my best, give my best," he told Eurosport.
"I am very happy I could win the first point for Spain."
Auger-Aliassime was playing his first match at the revamped tournament this week after an ankle injury, with Canada reaching the title-decider by using just the same two players in all of their singles and doubles matches - Shapovalov and Vasek Pospisil.