Complex sentence: At the US Open, Bertens managed to get revenge on Christina McHale, knocking out the American in the first round but suffered a three-sets loss to Russian Olga Puchkova in the second round and said afterwards she was nervous during the match.
Split into simpler sentences: At the US Open, Bertens managed to get revenge on Christina McHale, knocking out the American in the first round. In the second round she suffered a three-set loss to Russian Olga Puchkova and said afterwards she was nervous during the match.