Andy is on the main court today, 3rd match on Center. (American spelling deliberate ) Maybe 8pm or so UK time, depending on how long the two earlier matches run.
He will be playing Sam Querrey: H2H 4-1 in favour of Andy, though Sam won their last encounter in the 2010 LA final. If I remember correctly, Andy entered that tournament, which had not been on his schedule, just after his split with Miles MacLagan. Provided his knee is ok Andy should manage this, he usually does well against big servers, but Querrey is certainly in good form at the moment so it may not be straightforward.
Re the knee - I saw a picture floating about the internet somewhere of him with Andy Ireland, and his knee was taped up. Hopefully that is just a precaution.
And it is second match on Grandstand, after a WTA match starting at 4pm UK time. So, as the WTA is Aggie Radwanska against a USA wild card which may not take long, any time after 5pm I guess.
Yes, that was unexpected. Chardy is always dangerous when he is on - but he doesn't often keep the level up long enough. Today he did, and combined with Andy playing a bit of a shocker, we see the result. He is going to lose an awful lot of points - 910!