Andy Murray and Daniel Vallverdu prepare for a practice session on Wednesday.

Andy Murray and Daniel Vallverdu prepare for a practice session on Wednesday. Photo: Getty Images

It's a relief just to get through that first round, especially in the hot conditions. It doesn't matter how hard you train, but if you haven't played many matches for a while, playing in 40 degrees is horrible.

You never know how you're going to respond, so even if you feel good in practice and you're hitting the ball well, even if it's after an hour and a half, two hours, you might start to slow down, so I'm just glad I got it done.

I feel fine physically just now, but I'm aware the matches are going to get tougher. It's going to be hot and you obviously can't do anything about that. I'll feel better after each round, but I don't know how I'm going to feel after a 3½-hour match.

When I was growing up in Scotland, the hottest summer day would have been mid-20, max. For me, even going over to Barcelona to train when I was 15 - being 10, 14 days in a row of 30-degree heat - was a bit of an eye-opener.

It's just a different sort of heat here.

In Europe, the air is always cool, so if there is a breeze or if you walk outside or go in the shade, the shade seems much cooler. Whereas here, you go in the shade and it's just as hot. The air that's coming in your face from the breeze is warm air. It's different to anything you get in Europe.

In this sort of heat, you have to be so careful. Before I played Go Soeda [Murray won 6-1, 6-1, 6-3], I had my shortest warm-up for a match that I've ever had since I've been on the tour. I hit for like 12, 15 minutes maximum outside and it was just horrible. You just hit a lot less in this weather, and on your days off, you can't do too much.

You can go indoors and hit, but for me, I always find that's the biggest change. Changing surfaces is hard, but for me, going from indoors to outdoors is a tough one so I'll probably just hit outside for 30 or 40 minutes or so on my day off.

I think I played well on Tuesday and even though I haven't played that many matches, I wasn't too surprised at that. I've played very well in practice and I've been moving well the past week or so.

The one thing I missed from my training in December was maybe playing enough points. I was very tired at the end of the training block. I'd put in a lot of work and I was maybe too tired for the points and stuff that I needed to do at the end.

When I got to Abu Dhabi for the World Tennis Championships, that was a bit of an eye-opener for me. It doesn't matter how much work you do in the gym - and you can be in great shape - I needed the matches. I got a couple there and practising with the top players like Berdych, Hewitt, Davydenko, Nishikori, these guys, for six days in a row, it really sharpened me up. Now I'm good.

I actually know nothing about my next opponent. I've never seen Vincent Millot play, I don't think I've even seen him around, but I do know that he played for 3½ hours to win in five sets on Tuesday.

The guys - Dani [Vallverdu] and Ivan [Lendl] - went out to watch a bit of the end of the match and they said both players looked like they were struggling towards the end. It's obviously going to be hot again [on Thursday] so it's going to be tough for him to recover in time.

When I don't know a player, I usually try to find a video of them playing. For most of the guys, there will be videos of them online. You can watch a little bit. I don't always watch loads but I like to watch a little bit just to see their technique and how they serve so that it's not a complete surprise.

Even the way they throw the ball up on the serve - some guys have a very fast action, some guys have a very high ball toss and if you don't know, your split step can be out and your timing of when you need to move for the serve can be out.

So, I'll always watch a little bit of video of whoever it is I'm going to play and then it's up to the guys, to Dani and Ivan, to chat to some of the players and find out a bit about them.