Force India driver Paul di Resta has insisted that he needs "a faster car" in order to stand a chance of securing a podium finish.
The Brit finished fourth in the Bahrain Grand Prix last weekend, but he has called on the team to "work hard" in the months ahead.
"We've got to take a great amount of credit and positives from the first four grands prix," the Scot told reporters at a press conference.
"But the team needs to work hard to bring updates because if they want this podium, they're going to have to work for it - probably more than we are at the moment.
"They want a podium. I said give me a faster car and they'll get a podium. If they work a bit harder in the design office and essentially get a bit more resource in there, there's no reason why we can't do it."
Sebastian Vettel claimed first position in the race.
