McLaren driver Fernando Alonso is hopeful that the outfit can continue to make progress after acknowledging that competition in the midfield is "very tough."
McLaren finished a lowly ninth in the 2015 standings but improvements across the winter have elevated the team back into a tightly-contested midfield.
Alonso finished in 12th place at the Chinese Grand Prix but is optimistic that he can improve on that result at Sochi this weekend.
"Our car feels very positive, and our progress is encouraging, but I hope we can achieve the potential we can see in our package and put in a promising performance on Sunday, which is when it all counts," said Alonso.
"It’ll definitely be a tricky race. Competition in the midfield is very tough, and a lot of the teams are looking pretty strong, with solid reliability.
"We had a smooth weekend reliability wise in China and we’re definitely learning a lot race-by-race, so I’m hopeful we can have a stronger result in Sochi.
"This race is particularly hard on fuel, so along with the tyre strategy there’ll be a lot of elements to manage."
Alonso placed 11th in Russia last year having been handed a post-race time penalty for exceeding track limits, which dropped him outside of the points.