Wimbledon Day 6 guide: Rafael Nadal faces Jo-Wilfried Tsonga test as Serena Williams looks to stay on track

Roger Federer and women's world No 1 Ashleigh Barty also in action on Centre Court on Saturday

Rafael Nadal goes up against Jo-Wilfried Tsonga in the third round at Wimbledon on Saturday. Reuters

The sixth day of Wimbledon on Saturday promises to be a busy one as the third round comes to a conclusion.

In the men's draw both Rafael Nadal and Roger Federer are in action and both face tough tests if they are to reach the last 16.

Rafael Nadal, the 2008 and 2011 champion, faces a potential tough challenge in unseeded Jo-Wilfried Tsonga, the former world No 5.

Tsonga is a two-time semi-finalist at Wimbledon and won his only clash against Nadal on grass in 2011 at Queen's in three sets.

Nadal will be confident, having seen off Nick Kyrgios in four sets on Thursday, but will be aware that Tsonga will be a threat if he can build any momentum.

Meanwhile, eight-time SW19 champion Federer goes up against 27th seed Lucas Pouille.

The Frenchman is the No 27 seed, but has been as high as No 10 in the world in the past and can be a threat on grass, having made the quarter-finals at Wimbledon three years ago.

In the women's draw, world No 1 Ashleigh Barty continues her push for a second successive major title when she takes on Britain's Harriet Dart in the opening match of the day on Centre Court.

Barty is on a 14-match winning streak, having won the French Open and then prevailed at Eastbourne.

Serena Williams, the 23-time major winner, is a possible quarter-final opponent for Barty.

The American, seeded No 11, will look to maintain her challenge for an eighth Wimbledon crown when she goes up against 18th seed Julia Goerges.

Williams has won all four of her past meetings with Goerges, with their most recent clash being 12 months ago when the 37-year-old won in straight sets in the semi-finals.

Here is Saturday's order of play on the main courts, with play starting from 4pm.

Centre Court

1-Ashleigh Barty v Harriet Dart

Jo-Wilfried Tsonga v 3-Rafael Nadal

27-Lucas Pouille v 2-Roger Federer

Court One

11-Serena Williams v 18-Julia Goerges

9-Sloane Stephens v 19-Johanna Konta

Joao Sousa v Dan Evans