Stephens prevailed 6-3, 6-0 in a US Open final between friends. (Getty)

The US Open women's final was one-sided, but it didn't lack emotion and drama. Madison Keys netted a forehand on match point to give Sloane Stephens the 6-3, 6-0 win.

Keys was not herself, committing 30 unforced errors to Stephens' six. The two good friends shared a long embrace at the net. 

And the sportsmanship didn't end there. Stephens would sit in the chair next to Keys while waiting for the awards ceremony.

And they shared some jokes during their speeches, particularly over Stephens' surprise at the $3.7 million winner's check.

Saturday was an epic day for American tennis, for first-time major champion Stephens and for friendship.