Marchenko looks like the man on form at the minute. He puts away a smart backhand winner that Murray barely attempts to move for and follows it up down the other side of the court with a huge forehand to edge ahead at 15-30.

Marchenko holds and Murray can't pull that break back. He doesn't look too comfortable at the minute, the world number one.

Well, that's another huge forehand from the Ukrainian that Murray can't get anywhere near down the line, but again he can't build on it. The next shot is fired into the net and it's 30-30.

Smart serve and follow up from Marchenko, he looks very dangerous when he comes into the net and executes that forehand nicely.

The next is a little wayward, though, and Murray brings it back to 15-15.

Andy Murray gets the better of that rally as Marchenko goes wide, and the Ukrainian then goes for an audacious attacking forehand from Murray's second serve.

It's pulled well wide, that's game to the world number one.

A couple of big serves from Murray are followed by Marchenko stepping in on his second serve to send the Scot wide, he almost looked as if he didn't expect that one to come back at him.

And Murray then sends what looked like a straightforward forehand into the net - Marchenko brings it back to 30-30.

Image source, AFP

The Ukrainian is showing off a fine array of shots here, a delicate slice does for Murray that time. 

Murray pulls on back, but is unable trouble Marchenko with a return following a big serve and the world number 93 hits a firm forehand winner.

Murray is giving himself a good talking to between points here. He certainly looks a little out of sorts, a bit flat at the moment.

Two unforced errors give Marchenko a 30-0 lead on his serve.

Marchenko breaks first again for the second set in a row. 

He had Murray on the run throughout that game and despite the world number's one's best efforts he can't keep up with the pace of Marchenko as he sends him one side of the court and then the other.

The Ukrainian takes to the centre of the court as Murray scrambles a return, and then smashes a big forehand winner out of his reach.

Marchenko drags this one back to 30-30, and then wins himself a break point as he forces Murray to attempt a return and the Scot can only push it into the net.

We've waited a while, but there's the classic Murray drop shot. So much slice on that one it looked like it might spin back into the net - inevitably, Marchenko can't get enough on it to trouble Murray with a return.

But he does on the following point, Murray allows the big Ukrainian to set himself for a big forehand and he makes the Scot pay. 30-15.

Another neat volley from the Ukrainian, he comes into the net and shows his versatile volleying skills with a sliced finish, and then follows it up with another point won at the net.

A big final serve to take the game, and it's Murray back on serve.

Marchenko's volleying game has been good, and he gives Murray the run around having lost the first point with a smash that the Scot has no chance of returning.

Murray makes short work of his first service game of the set, three big first serves followed by a neat backhand to work Marchenko around the court and he takes the first game.

It's had that first match of the tournament feel from Andy Murray so far, but he's come through a tricky first set after being broken in his opening game and that might knock the stuffing out of Marchenko a little, who had looked confident and aggressive out there.

It's Murray to serve in the first game of the second set, and quickly establishes a 30-0 lead with two big serves.

Let, fault...the pressure is really on Marchenko with this second serve and that shows as Murray is allowed to take control of the point and forces his opponent deep.

Marchenko attempts to dig one out from beneath his feet but sends it long, and that's the first set to the world number one. 

Image source, EPA

Marchenko's up, then he's down. He plays a great shot, and then he misjudges the next.

Murray hasn't had to play particularly well in this game but now he has a break and a set point at 30-40.

Murray isn't impressed with his return again there as he almost pats it back over the net and then loops a forehand wide of the line.

But he steps into a Marchenko second serve to force his powerful opponent into a mistake and it's back level at 15-15.

Well, the world number one doesn't give too many chances away and having let Marchenko get back into that one he is in no mood to pass up another opportunity to win this game.

Make no mistake, the Ukrainian isn't making it easy for him though.

There's some serious power on show out there and again it's Marchenko who makes a move towards the net, but he can't quite control a passing Murray shot and the ball drops narrowly wide.

Murray has the chance to take the game, but he puts Marchenko's powerful return into the net.