​Mental toughness separates good tennis players from great ones, and Jessica Pegula demonstrated exactly why she belongs in the elite category Friday. The fifth seed wasted six set points in the opening frame before rallying to dominate compatriot Emma Navarro 6-7, 6-2, 6-1, becoming the third American to reach the China Open semifinals. Pegula’s ability […] The post Jessica Pegula’s resilience shines after crushing opener appeared first on Rolling Out.