I don't think they can risk playing Greg on Friday, the doubles will be crucial and Tim & Greg must play together at their best, to give GB the chance of taking the tie. Greg is not match fit and if he has a long 5 setter, on heavy clay on Friday, he won't be at his best for the doubles. There is also the risk of him picking up an injury on Friday (or maybe he's got a slight one anyway as why did he lose in straight sets in Delray?) So they need to maybe forgo one rubber on the first day. Thats always supposing Tim can win his rubber on Friday which is no forgone conclusion, this clay won't be like the French and he lost to Melzer earlier this year. We also don't know who will be playing first until the draw - Its going to be a very tricky tie and if it comes down to a live fifth rubber, goodness knows who Bates will put in, probably Greg if he hasn't played the two previous days. If he has played on Friday & Sat, he's said himself he can't play 5-setters 3 days in a row and his form of late backs that up. What has Mackin done recently?, probably not much or he would have been selected for the team. At least Murray is coming off a big win and his best surface is clay, he looks as if he has the stomach for the big matches so give him a chance, what have we to lose. If he's going to be beset by nerves it doesn't bode well for the future but hopefully he'll shine, You have to play 5 set matches sometime, Tim hadn't played a 5 set match until he beat Kafelnikov at Wimbledon in 96.