US Open day seven tennis acca: free accumulator for Flushing Meadows

The Racing Post's tennis experts will select their best multiple bet for the US Open every day. Here is the day seven acca:

Serena Williams to beat Petra Martic 2-0

Serena Williams has looked in fine form at the US Open and is likely to continue her bid for a 24th Grand Slam by brushing aside Petra Martic. The Croat has plenty of variety but that's unlikely to help her against the brutal power of the greatest player in the history of the women's game.

David Goffin to win at least a set against Roger Federer

Roger Federer eased through to round four at the expense of Britain's Dan Evans but David Goffin should provide the Swiss maestro with a tougher test. The Belgian reached the Cincinnati Masters final while Federer has dropped sets against Sumit Nagal and Damir Dzumhur in his first two matches in New York.

Madison Keys to beat Elina Svitolina

Madison Keys tends to thrive in front of the Flushing Meadows crowd and she should have too much power for Elina Svitolina. The American ace reached the US Open final in 2017 and a straight-sets win over compatriot Sofia Kenin in round three is an indicator of how well she is playing.

Alex de Minaur to beat Grigor Dimitrov

Grigor Dimitrov continues to struggle on court and the Bulgarian has enjoyed a charmed run to the last 16, benefiting from the withdrawal of highly-ranked round-two opponent Borna Coric. However, he faces a huge ask against Alex de Minaur after the Aussie youngster beat Kei Nishikori to reach this stage.

£1 stake returns £6.38 with Sky Bet.

Today's top sports betting stories

Follow us on Twitter @racingpostsport

Like us on Facebook RacingPostSport