It was a pretty tough first round for Serena and the first set was very competitive.
But after winning the first set Serena was able to take control of the second set and win the second and the match.
Heather Watson lost to Vavara Lepenchko in three sets. Heather won the first set very comfortably then seemed to lose confidence and the match in the second and third set.
This was a bad loss for Heather and her world ranking will now drop to ninety. Next week she has to defend her Osaka title and if she is unsuccessful then she will drop out of the top 100.
Laura Robson beat Klara Zakopalova in three sets. It was a real battle in the first and second set but she won the third set comfortably and she now faces Angelique Kerber in the second round.