Gallery: The story from a riveting day three at the 2018 US Open
We look at the action from day three at the US Open at Flushing Meadows.
It was a day to forget for 15th seed Stefanos Tsitsipas as the Greek was beaten by Daniil Medvedev.

The smooth service motion of Venus Williams, who reached the third round.

Defending champion Sloane Stephens was made to work for her win over Anhelina Kalinina.

Julia Goerges on the run…out of the US Open after losing to Ekatarina Marakova.

It was a case of down and out for Jason Kubler as the Australian was forced to retire from his match against Taylor Fritz after injuring his ankle.

Andy Murray had his moments against Fernando Verdasco.

But the Spaniard held his nerve to beat the three-time Grand Slam winner.

It turned into a frustrating day for Murray.

Next up for Verdasco is Juan Martin del Potro after the Argentine saw off the challenge of Denis Kudla.

Kevin Anderson in action while the sun goes down…the South African brushed aside Jeremy Chardy.

One of the main attractions, Serena Williams, arrives on court.

These shoes were made for winning. And win they did as Serena beat Carina Witthoeft in straight sets to set up an encounter against sister Venus.

Meanwhile, Rafa Nadal just quietly went about doing Rafael Nadal things…