Swiatek/Ruud* 1-1 McNally/Musetti [Sets: 1-0]
Casper Ruud is looking lethal on his own serve.
Despite being a singles player usually, he serves and charges into the net like a real doubles player.
He holds serve with ease and squares the match up.
Swiatek/Ruud 0-1 *McNally/Musetti [Sets: 1-0]
One of the best rallies of the day between the two pairs.
It sees Musetti plays a superb forehand down the baseline, which looks out, but the replay shows it just touched the line.
Swiatek/Ruud manage to claw their way back into it as they square the game up at 30-30.
A double fault from Musetti then gifts break point to their opponents.
Ruud then sends a shot from the baseline into the net to tie us up at deuce.
A superb cross shot from Musetti ensures they hold serve.
Swiatek/Ruud* 4-1 McNally/Musetti [Sets: 1-0]
McNally/Musetti quickly go into a 0-30 lead in this one.
However, Ruud steps up his game and single-handedly wins two points back.
A good net shot from Swiatek then sets up set point for the pair.
As Musetti sends a volley long, it took all of 16 minutes for the first set to be concluded.
Swiatek/Ruud 3-1 *McNally/Musetti
McNally agreed to join this pairing very late in the day.
She was only playing in Cincinnati yesterday.
Ruud gets some good shots in as the game is tied at 30-30.
Casper Ruud is looking in lethal form out there.
He smashes a forehand down the middle for the break of serve.
Swiatek/Ruud* 2-1 McNally/Musetti
Finally we see some points won off the serve of an opponent.
Some good work from Musetti at the net, forcing Swiatek to make up some ground.
McNally/Musetti have a break point in this one.
Musetti misses the chance to break as his deft volley at the net drops wide of the line.
A long return from McNally sees Swiatek hold her serve.
Swiatek/Ruud 1-1 *McNally/Musetti
This match seems to be very much going with serve here.
Another game where no points are won off the serve by the receiving pair.
Based on what we have seen in the opening stages, this could head to a tie-break to decide the set.