Sergio Perez wasn't satisfied with securing the best result of his 2015 F1 season, insisting that Force India needs to look for further gains.

The Mexican made the most of being elevated to row two of the grid at Spa-Francorchamps, capitalising on Nico Rosberg's poor getaway to challenge polesitter Lewis Hamilton into Les Combes on the opening lap. Despite running second for a while, however, he lost out to Red Bull's Daniel Ricciardo in the first round of pit-stops and eventually slipped back to the tail of the top six.

That became fifth at the chequered flag following Sebastian Vettel's tyre failure, but Perez admitted that he had been unable to keep the likes of Romain Grosjean and Daniil Kvyat at bay as both caught and passed him in the latter stages.

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"Fifth place and ten points is a good result, but we just lacked the pace to really fight for the podium today," Perez confirmed, "My start was very strong and I was close to taking the lead on lap one when I was alongside Lewis after Eau Rouge.

"I settled into a good rhythm, but we had very high degradation on the soft tyres in the first two stints. It was a bit better on the medium, although we struggled in the middle sector with our low downforce set-up and that hurt my pace. We were racing some quick cars and it was hard to fight off Grosjean and Kvyat, so it's clear we need to analyse our performance and see where we can improve."

Perez's performance was lauded by team boss Vijay Mallya, who had seen his other car fail to take the start after a repeat of its Saturday power problems.

"Sergio delivered a battling performance and extracted all he could from the VJM08," Mallya noted, "He was able to challenge for the podium positions at the start of the race and to finish with a fifth place, his best result of the year so far, confirmed the good pace he has shown all weekend. He didn't put a wheel wrong all day and was able to keep some very competitive rivals behind with an intelligent and defensive drive."

In spite of his comments, the higher-speed circuits have often been kind to Force India and its predecessors and, with the Italian Grand Prix next on the agenda, Perez is keen to get back on track.

"I'm already looking forward to the next race in Monza, which is another track where I think we can be competitive," he concluded.