21-year-old Valimaki claimed his European Tour card for this season after coming through qualifying school
Finland's Sami Valimaki won the Oman Open in a dramatic play-off on Sunday in just his sixth European Tour event, describing his performance as "awesome".
The 21-year-old edged experienced Brandon Stone of South Africa at the third extra hole.
"It's awesome," Valimaki, who claimed his card for this season after coming through qualifying school, told europeantour.com.
"There are not many words to say, it's unbelievable."
Stone had holed a 20-footer on the last to get to 13-under for the tournament but Valimaki then holed from a similar range to set up the play-off.
France's Adrien Saddier finished a shot further back with Italy's Guido Migliozzi and Mikko Korhonen of Finland, two off the pace.
Lorenzo Gagli, who had started the event in quarantine after a coronavirus scare before being given the all-clear, ended five shots off the lead.
Italian compatriot Edoardo Molinari, who was also kept in isolation, finished 11 behind the champion.