Reigning US Open champion Daniil Medvedev joined the growing list of top-seed casualties at the ATP/WTA Indian Wells on Wednesday, losing in the fourth round to World No. 28 Grigor Dimitrov 4-6, 6-4, 6-3.

Medvedev, who won his first Grand Slam title last month at Flushing Meadows, had not lost a set heading into the fourth round but dropped eight straight games, and had his serve broken six times against Dimitrov, en route to a stunning early exit for the top seed. “I don’t remember myself losing three service games, even four service games ever on hard courts,” Medvedev said.