Hopefully just some adjustment to be made by Koobs.
American clay courts are different to European, more like the Roland Garros courts. If it has been dry weather they play harder, more like a slow hard court than the soft European conditions, so are quicker.
As JM says - hope he just had a bad day...
He has been awarded a wildcard into the 10k Spainish Futures tournament at Rafaland. In the first round he plays Pablo Careno-Busta which will be a very difficult match and Carreno-Busta will start the favourite to win.