Andy Murray has been forced to withdraw from the Rogers Cup in Toronto with a knee injury.
The Oympic gold and silver medallist received treatment during Wednesday's /tennissecond-round win over Flavio Cipolla.
The Brit had played down any injury concerns following his match with the Italian.
Murray, who was due to face Milos Raonic for a place in the quarter-finals, is expected to be fit for next week's Cincinnati Open.
