Fernando Alonso believes "the next two months are crucial" to McLaren's hopes in this year's Formula 1 world championship.
After a difficult winter of reliability problems, McLaren made an encouraging start to the 2018 season with their new Renault engine partnership as Alonso led home a double-points finish for the team in Australia.
Alonso's fifth-place in Melbourne was McLaren's joint-best since he rejoined the team in 2015 after three seasons of underperformance with Honda power units.
But the two-time world champion concedes McLaren still have plenty of work to do to reel in Mercedes, Ferrari and Red Bull but reiterated they are now in a position where their fate is solely in their hands.
"There is still quite a reasonable gap to close to the leaders. But I think it's up to us now, it's up to the team to deliver the performance in the next weeks, in the next four, five, six grands prix," Alonso said ahead of the Bahrain GP.
"If we are able to bring the performance to the track and close that gap and be in a reasonable distance to pole position and podium finishes then it is up to us to deliver the result on weekends.
"I think the next two months are crucial for our hopes in this year's championship."