The point being it's possible Madeleine was pushed or fell off the sofa whilst they were playing unattended. This was around the time David arrived and everyone knows they contradicted each other about that visit.
I find their account of that whole period strange. Three men walked up from the beach to play tennis. They all agree they did that, but what they did when they arrived is very diifficult to ascertain.
One says he went to the courts to see 'what was happening'. He can't remember what his two companions did.
Matthew decides to speak only for himself; "well I went back to the apartment, got the tennis gear and back onto the courts...........the other guys went to get their stuff."
Russell says he and Matthew went straight to the courts while David went off "to his apartment and I believe, erm, to Gerry and Kate’s apartment as well."
So we're not sure what happened when they drew near to the Tapas entrance and they can't or won't tell us.
(all taken from their rog. statements)