Teenager Bianca Andreescu beat 23-time major champion Serena Williams 6-3, 7-5 to turn into Canada's first Grand Slam singles champion here in the US Open finals.

Williams was denied a record-rising to 24th Slam title as the 19-year-old Andreescu on Saturday turned into the youngest Grand Slam victor since Maria Sharapova at the 2006 US Open.

While it was the fourth progressive defeat in the finals for Willams, Andreescu tied Monica Seles, who lifted the 1990 Roland Garros trophy in her fourth major, for the record as the quickest player to get a first Slam crown in the Open time.

The morning demonstrated the day as Williams by surrendered her opening administration game with progressive doubles blames at Arthur Ashe Stadium. Andreescu did not release the blessings futile as she benefited from them and accepting the first set as Williams gave her the first with another double fault.

In the second set, Andreescu, who had neglected to arrive at the first draw at Flushing Meadows in the past two years, surged 2-0 ahead.

Williams battled again from being 5-1 down to level 5-5 by hitting 14 of 17 points in a pulsating contest.

The Canadian at that point held for 6-5 and Williams blundered on a strike to give Andreescu two additional shots at the title. Williams hit an expert to spare the first however Andreescu verified triumph on the following with a crisp forehand return.