McLaren racing director Eric Boullier has warned the team is likely to struggle relative to its competitors in Spa and Monza.
Honda is bringing an updated power unit to the Belgian Grand Prix this weekend, which has been predicted as being a "big step" forward in performance by motorsport boss Yasuhisa Arai. However, Boullier says the high-speed nature of the next two tracks will not suit McLaren and he says it will be Singapore before the team is competitive again.
"After a well-deserved summer break for the whole team, we're all ready and raring to go at the start of the second half of the season," Boullier said. "We had an encouraging race in Hungary leading into the summer break, and we now feel refreshed and determined to continue improving our form as the rest of the season progresses.
"We've persevered through some tough moments, but the positivity and steadfast commitment to McLaren-Honda's future success are evident in every single member of this team. Our drivers, too, have been unwavering in their support and are working hard to keep pushing us forward, extracting the maximum from the package at every opportunity.
"We're also incredibly grateful for the support of our partners, who are incredibly loyal, and who are united behind our development programme. In the second half of the season, our fight towards the front will continue, and we'll work hard to build on our steady, solid progress in pursuit of performance.
"Spa is a truly spectacular circuit - arguably the best on the calendar for many - but, given the unique power and downforce package required, the track won't play to our strengths. Therefore, of course, we must be measured in our optimism, and we will need to wait for Singapore and beyond before we can see the fruits of our labours reflected on track."
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