McLaren boss Zak Brown believes his team is on a path back to the front of the grid but is refusing to set specific targets for 2019.
McLaren finished sixth in 2018 but failed to make the progress it had expected ahead of the year having switched from Honda to Renault power. During the season it parted company with racing director Eric Boullier and started an extensive rebuilding process of its entire operation.
The team has not claimed a victory since the 2012 Brazilian Grand Prix and has not been on the podium since the opening race of 2014.