Though Gauff's playing style isn’t particularly suited for success on grass, Roddick said on his podcast, Pegula's loss was "most shocking" because hers is. Pegula's quick exit at Wimbledon came only three days after she had won another grass-court tournament in Germany that was seen as a warmup for Wimbledon.

Highlights of the fourth day at the Wimbledon tennis championships on Thursday (times GMT):1928 KASATKINA OVERCOMES BEGUAustralian 16th seed Daria Kasatkina defeated Romanian Irina-Camelia Begu 6-2 4-6 6-1 and will meet Russian Liudmila Samsonova in the third round.

The immaculate grass courts at the Wimbledon tennis championships can divide opinion. Some players struggle to find their rhythm on a surface that is unpredictable and unfamiliar. Others revel in it.