LEWIS Hamilton has described the last two races as “the worst” possible following his retirement from today’s Singapore Grand Prix.

The 25-year-old McLaren Mercedes driver from Herts crashed out of Formula 1’s night race on lap 36 following a collision with Mark Webber.

Hamilton overtook his Red Bull rival on the outside along the straight heading towards turn seven, but was then clipped from behind coming out of the corner, puncturing his rear left tyre.

“I’m not really sure that happened,” said Hamilton after the racing incident that has put a massive dent in his world championship hopes. “He was in my blind spot, so I didn’t even know he [Webber] was still there.

“I’ll have to look at the replay. I honestly don’t even know what happened. I didn’t see anyone alongside me and the next thing I know my tyre is blown and that’s it.”

To add insult to injury, Red Bull driver Webber eventually finished third to maintain his lead in the overall world championship. Hamilton now lags 20 points behind the Aussie in third place.

Ferrari’s Fernando Alonso is also now ahead of him in the race for the world title following back-to-back victories and 50 points to the Tewin man’s two did not finishes this month.

The McLaren star accepts it will be hard to regain the F1 world crown now after crashing out of both the Italian and Singapore Grands Prix.

When asked whether he can still win the title, Hamilton replied: “It’s a tough call. There’s still four races to go.

“I couldn’t have expected a worse two races, especially at this crucial point of the year. I’ll do what I can, but I just hope that myself or Jenson [Button] can do it.”

The next race is the 2010 Japanese Grand Prix at Suzuka on Sunday, October 10.