Serena Williams produces best performance in seeing off Danielle Collins

Williams beginning to look like a genuine French Open contender

Serena Williams powered her way into the fourth round (Christophe Ena/AP)

Serena Williams is looking more like a French Open contender every day and she produced her best performance of the tournament so far to beat Danielle Collins 6-4 6-4.

The 23-time grand slam singles champion is the only top-10 player left in the bottom half of the draw after third seed Aryna Sabalenka suffered an error-strewn loss to Anastasia Pavlyuchenkova.