U.S. Open: Has Serena Williams put off retirement after the first round win?

Serena Williams signalled she is not quite ready for retirement advancing to the second round of the U.S. Open on Monday with a scrappy 6-3 6-3 win over Danka Kovinic. The victory over the 80th ranked Kovinic, just her second this year, will be a confidence boost for Williams but the path to a record equalling 24th Grand Slam now gets treacherous.