Good evening and welcome to Eurosport's LIVE coverage of Day Four of the 2018 US Open. We'll be focussing on the match between Lesia Tsurenko and Caroline Wozniacki here.

TSURENKO 5-2 WOZNIACKI* (6-4): It's a double break for Tsurenko in the second set and she will serve for the match when play resumes. The errors were flying off the racquets of both players there, but Tsurenko keeps it tight.

*TSURENKO 4-2 WOZNIACKI (6-4): This is getting real for Wozniacki. If she gets broken here then it will surely be curtains for her and her US Open challenge for this year.

TSURENKO 3-2 WOZNIACKI* (6-4): That could be a big moment in this match. Tsurenko brings up two break points and takes one of them as Wozniacki loops a forehand long of the baseline.

TSURENKO 1-2 WOZNIACKI* (6-4): There's much more control to Wozniacki's play from the baseline at the start of the second half. We have had three straight holds. Novelty.

TSURENKO 0-1 WOZNIACKI* (6-4): Good start to the second set from Wozniacki. Her first serve percentage was up. That will crucial if she is to force her way back into this match.

FIRST SET GOES TO TSURENKO! 6-4. The second set Wozniacki is up against it here. Tsurenko received some treatment for an elbow injury, but has recovered really well to establish a lead.

TSURENKO 5-4 WOZNIACKI*: Tsurenko will serve for the opening set here. Wozniacki decides to come to the net for a couple points and cuts short some of the epic rallies that have been harming her.

*TSURENKO 5-3 WOZNIACKI: Very big hold. Consolidating a service break has been a rare thing in this set, but after facing down a couple of break points, Tsurenko gets it done.

TSURENKO 4-3 WOZNIACKI*: Wonderful backhand down the line to close out the break of serve for Tsurenko. There has been seven games in this set and five of them have been breaks.

Back in play now...

Tsurenko is receiving a medical timeout. Not quite sure what the problem is, but we're going to have the customary three minute break in play.

TSURENKO 2-3 WOZNIACKI*: Oh, this is just getting silly now. Another break of serve...

*TSURENKO 3-1 WOZNIACKI: And now it's the Dane's turn to break again! Does anyone fancy holding serve in this first set? That's three breaks that we have had now.

TSURENKO 1-2 WOZNIACKI*: Great reply from Tsurenko, who has broken back immediately to get back on serve at the start of the first set. Fantastic tennis.

*TSURENKO 0-2 WOZNIACKI: Very good start for Wozniacki. The pressure was on the Tsurenko serve right from the very first point and eventually the Dane gets the early break.

The two players are on court, going through their pre-match rituals...