Breaks traded, then a tiebreak, Wu took it 7-2.
Wu broke for 2-1 and again for 5-2, clinical in sealing it 6-2, with Walton's only resistance a deuce hold for 2-3 saving both break points.
Wu broke for 6-5 after Walton saved two of three break points in a deuce game, then held for 7-5 following an 11 minute hold for 5-5 saving both break points.