Jenson Button is positive he will be able to maximise the "great opportunity" he has to participate at this weekend's Monaco Grand Prix.

The 2009 world champion is standing in for former team-mate Fernando Alonso, at a race that will offer McLaren their best chance for points so far this season.

Ahead of his one-off return, however, there has been some questions around both the 37-year-old's commitment and whether he will have a car capable of simply making the finish.

But Button brushed off the concerns saying: “It feels slightly surreal to be back in the cockpit for the Monaco Grand Prix. When the call came from Eric there was no hesitation – it’s a totally unique situation and a great opportunity.

“I’m looking forward to stepping back behind the wheel for one of the most crazy, unpredictable and exciting races of the year.

“Although I haven’t turned a wheel on track yet in the MCL32, I feel well prepared,” he added. “I know the track well, of course, and I’ve done quite a bit of work in the McLaren simulator already.

“I’m still fit, and I’ve been training probably more than ever, because I’ve had the time to focus on my triathlon preparation and competitions. I’m looking forward to working with the team again, and, as I’ll be on the other side of the garage this time around, I’ll do my best to look after the car for Fernando!”

The veteran of 305 Grand Prix starts is also confident the pace shown by Alonso over a single lap in Spain is proof McLaren can start to become more competitive and especially in Monaco.

“It was great to see the performance of Fernando in Barcelona, P7… what a step forward," Jenson declared. "He obviously did a great lap but it shows how much of an improvement the team has made and we have another good step for Monaco.

“I initially didn't like the feel of the car [in the sim] but this was before the updates. We made some set-up changes and it felt much better and suited my style more. With the updates, it is pretty awesome to drive.

“So it's very positive for me it is a great race to come back for, it was my home for 17 years, I have won in Monaco and had some great races in Monaco. It is a race where the car should work well. Hopefully [we can be in the points], if Alonso can put it seventh in Barcelona we should be looking sweet for Monaco.”