Lewis Hamilton insists that he has bigger things to worry about than the simmering row involving his Mercedes team and an apparently illegal tyre test in Spain.

The Briton is reported to have taken part in the three-day session, designed to help Pirelli evaluate potential tyres for the 2014 F1 season, which has now escalated into the latest full-blown dispute between teams and the FIA after Mercedes involvement was protested by rivals Red Bull and Ferrari [ see separate story].

Hamilton, however, says there is little he can do to affect the situation, and will prefer to concentrate on his own game instead. Having qualified on the front row alongside eventual winner - and team-mate - Nico Rosberg in Monaco, the Briton let a podium finish slip through his fingers with a tardy approach to his one and only pit-stop, dropping to fourth by the time he rejoined the circuit.

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That error only added to the growing perception that Rosberg may actually have the upper hand on the man many believed to be the fastest in F1, after the German claimed his third straight pole and Mercedes' first win of 2013.

"I just wasn't good enough over the weekend," Hamilton was quoted as telling Britain's Independent newspaper in the wake of the race, "I've lots to sort out on my side of the garage, and within myself, and I'll take time to do that. At the moment, I'm not quick enough, not on it enough, so I need to get on it. I expected [Rosberg] to be competitive, it's just that I expected myself to be more competitive."

Hamilton does not disguise the fact that he was involved in the questionable Barcelona test, but insisted that it was not going to play on his mind.

"We were required to do some work, we did some work, and it was good fun," was his terse assessment of the issue, "Right now though, I'm not concerned about it - that's for the team to worry about. I just have to focus on myself and try and get my act together.