Red Bull team principal Christian Horner has asserted that the reigning world champions can take the fight to Mercedes in the 2014 championship.
Mercedes has claimed four successive pole positions and wins in 2014 and leads Red Bull by 97 points in the constructors' championship.
But Horner remains confident that Red Bull can catch Mercedes once they resolves their issues with the RB10.
"We've got to [resolve issues] if we're going to make a championship of it," he told Sky Sports. "We've got to take the fight to them.
"We're going to give it everything. I believe we can take the fight to them, we just can't concede too much more ground."
Horner admits it's 'quite simple' where Red Bull was losing ground to Mercedes across the opening races.
"We were 22kph slower on that kilometre straight [in China], that represented almost 100 metres that we were giving away on the straight.
"That's where we've got to improve - it's quite simple. We know where we've got to fix our issues and hopefully there are some steps towards that in Barcelona."