Cut adrift concern for McLaren

Lewis Hamilton has warned McLaren are in danger of "falling behind" their Formula One rivals unless results improve.

Hamilton has yet to win a grand prix this season and a fifth-placed finish in Monaco on Sunday means he now trails drivers' championship leader Fernando Alonso by 13 points back in fourth position. Team-mate Jenson Button had to retire after he crashed into Heikki Kovalainen in the Principality, with Mark Webber of Red Bull becoming the sixth different driver to win the sixth race of the 2012 season. Next up is the Canadian Grand Prix in Montreal on June 10 and two-time winner Hamilton, the 2008 world drivers' champion, said it was imperative McLaren got back in the race. "The team have definitely got some work to do because we are falling behind race by race," said Hamilton. "The others are picking up serious pace. If we are not lucky then it will fall away from us too quickly."