'Uncomfortable' Hamilton bracing for 'improved' Red Bull clash at Spanish GP

Mercedes driver Lewis Hamilton is all set for a Red Bull fight back at the Spanish Grand Prix this weekend as the defending champions prepare to unleash their improved car this weekend.

Despite winning the last three races Hamilton is not sitting comfortably as Red Bull believe that they have finally got a grip on Sebastian Vettel's engine problems.

According to the Mirror, Hamilton said that his team is not sitting comfortably and they know that they have got more work to do, as Mercedes is quicker on the straights but Red Bull is very, very quick through high-speed corners.

Meanwhile, Red Bull would bring their biggest batch of developments yet to both car and engine and Renault's head of track operations Remi Taffin has described their latest engine developments as 'promising'.

Taffin said that they want to have something that is close to 100 percent ahead of the race in Montreal, adding that it looks promising but they must not forget about reliability.

The twisting Barcelona circuit might prove to be a challenge for Mercedes driver Hamilton where as it could suit Red Bull car's superior handling, the report added.