Samsonova broke for 1-0 and again for 5-2, clinical in sealing it 6-2, with Gauff's only resistance a deuce hold for 2-3 saving the sole break point.
Gauff broke for 6-4 to level the match, either side of a 26 minute weather delay, after Samsonova held for 4-4 following an 8 minute deuce hold for 4-3 from Gauff saving both break points.
Gauff broke for 3-1 and again for 5-1, dominant in taking it 6-1, with Samsonova's only resistance a 9 minute deuce hold for 1-1 saving all three break points.