At the same time, though, the Swiss captain, Severin Lüthi, must be wondering what has hit him after a potentially crippling weekend for team unity. There is also a question over whether the fallout contributed to Federer’s back trouble, which he says developed in the third set tiebreak and eventually led him to make a dramatic and unprecedented withdrawal from the final on Sunday at the 11th hour. At the very least, the gym summit held him up from attending to the injury with physiotherapy at the earliest opportunity.