US Open, Flushing Meadows
Dates: 30 August - 12 September Start time: 1600 BST
Coverage: Live text commentary on BBC Sport website and mobiles; updates on BBC Radio 5 live; live on Sky Sports
Murray got the measure of Brown after a testing first set
By Andy Murray
World number four and British number one
That was a very different match - Dustin Brown is certainly an unpredictable guy to play against and I'm happy to have got through it.
There wasn't much time between points because he played very quickly and didn't sit down at the change of ends, so he was up and ready to play very fast, but I was always up in the match and didn't really give him that many opportunities.
I serve-volleyed a lot in the second and third sets just to dictate what was going on in the points because I was hitting serves and he would smash one out or hit a big return.
The atmosphere was great at the start of the match because he was hitting a lot of fun shots but it got quieter towards the end as I was in control - it was definitely nothing like Novak's match last night!
I was watching that on television but I didn't actually see the punch-up in the crowd. I'd gone out of the room and when I came back the players were just waiting and looking up into the stands to see what was going on - not too sure you'd see that at Wimbledon!
After today's match I headed straight to the practice courts for 45 minutes just to hit a lot of balls because there weren't many long rallies and I wanted to find some rhythm.
I've got Alex Corretja and Dani Vallverdu working with me in New York, and as well as helping me out on court they keep my Spanish up to speed.
I trained in Barcelona when I was younger, so I know a little bit, and while they obviously speak Spanish to each other they can ask me questions or I'll butt into their conversations in English because I understand a little.
The story of the week so far has been my fitness trainer Jez and the number of forfeits he's got to do
When I was in Spain it was decent and I understood quite a lot, and now when I'm around my friends, some of them speak Spanish and I'll start to pick it up and understand it. Alex's jokes are actually much funnier in Spanish, but even then they're not great.
The story of the week so far has been my fitness trainer Jez and the number of forfeits he's got to do. He's lost a lot of games of football tennis in a row - he hasn't won for at least four or five days now and he's been awful, he claims unlucky.
We normally try and play for the same kind of forfeits each day so they build up and he's got four of the same thing to do. He's got to tell a joke that doesn't make sense to someone and see what the reaction is.
He did one the other night and said to the waiter in a busy restaurant, "Why did the sushi roll?" "Edamame." The American waiter didn't have a clue what was going on. He's also been carrying everyone's tennis bags to and from the courts in one go, not a pretty sight on a very hot day. That's the kind of stuff we find amusing - I guess we're pretty immature!
We'll see how many he's done by the time I finish my third-round match.
Next up for me is Stanislas Wawrinka and I know him pretty well.
We played here two years ago
and I think it was my first ever night match in New York. I played great, beat him in straight sets, but we've had some really close matches.
The five-set win at Wimbledon last year
was a great experience, and that ended up being a night match too. I started off badly that day but came back in the end and I need to be on my game from the start this time because he's a very dangerous player.
That's me done, catch up with you again after my match on Sunday, if Hurricane Earl doesn't disrupt the schedule of course.
Andy Murray was talking to BBC Sport and will be contributing regular columns throughout the US Open