Complex sentence: With the victory, Serena tied the open era record of six US Open titles held by Evert, and this was her third US Open championship to come without losing a set also tying Evert.
Split into simpler sentences: With the victory, Serena tied the open era record of six US Open titles held by Evert. This was also her third US Open championship that she competed in without losing a set, also tying Evert.