David Ferrer of Spain reached the final of the ATP Ski Star Swedish Open on Saturday, but not before a man interrupted his match with fellow Spaniard Fernando Verdasco by shouting a Nazi slogan in Bastad, Sweden.
A man wearing a black T-shirt and tan trousers walked onto the course during the second set, raised his right arm with fist clenched and shouted: "Hell Seger!" ("Sieg Heil" in Swedish).
The umpire stopped play, which was resumed after the man was led away by security guards.
Ferrer lost the set but went on to a 6-1, 6-7 (3), 6-4 victory and will meet Alexandr Dolgopolov of Ukraine, a 6-3, 6-2 winner over Andrey Kuznetsov of Russia, in the other semifinal.
It will be Ferrer's first ATP World Tour final since October 2015 at the Erste Bank Open 500, one of five titles he won that year.
The eighth-seeded Ferrer reached his fourth final in Bastad and his 52nd overall, with a 26-25 record in those matches.
The 28-year-old Dolgopolov took a 3-0 lead en route to winning the first set, and broke Kuznetsov's serve twice in the second set before closing it out on his third match point chance.
"We had a lot of tight games and he had a number of chances on my serve, but I kept it tight and ran away with it in the second set," said Dolgopolov, who is seeking his four career WTA title, including the Argentina Open title in Buenos Aires in February.