Force India team principal Vijay Mallya believes there is more to come from the team's upgrades after they ran in the Spanish Grand Prix.

Like many of the teams, Force India had a number of new parts on its car in Barcelona 10 days ago as it looked to cement its position as podium contenders. However, with Red Bull showing further improvement, the team was limited to ninth and tenth in the race and dropped behind Ferrari to fourth in the constructors' championship.

Reflecting on the race weekend in Spain, Mallya said there wasn't much more Force India could have done but believes the full potential of the updated car is yet to be seen.

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"It was a good weekend," Mallya said. "Perhaps with a different strategy we could have stolen one more place with Sergio [Perez], but overall everybody seemed satisfied that we had come away with a fair result. Barcelona has never been the greatest track for us, so it was good to see both the cars in the points. We brought some updates and worked hard to optimise them, but there is a bit more we can do to take full advantage of those parts in the coming races."

And Mallya admitted he isn't disheartened to see bigger teams such as Ferrari and Red Bull starting to pull away from Force India as the season progresses.

"It's a given that things will always change in Formula One, especially in the first year following major rules changes. We have noticed our immediate competitors are getting stronger, but we are working hard to maintain our competitive advantage."