New Delhi, June 14 -- he went to the net, knifed a backhand volley winner, and refused to lose. A few minutes and several more near-disasters later, he had won a tiebreak that stretched to 16-14 and eventually a match that stretched nearly three hours. Nobody in the draw has made it look harder. Nobody else is still standing.

Shelton has now lost the opening set in every match he has played this week, saved match points in two of them, and kept winning anyway.

"Sometimes tennis doesn't go to plan," Shelton said after the match. "I lost the first set in every single match I played. That can make things difficult, but there are a lot of ways to win a match. I've been choosing the most difficult route."

What makes Sunday worth watching is...