Lotus are targeting a good finish to the 2013 season with the team ready for an intense battle with Ferrari and Mercedes.
Having struggled at the last two European races, the Enstone squad bounced back at the first flyaway race at Singapore with Romain Grosjean qualifying P3 before being forced to retire while challenging for a podium. Kimi Raikkonen, meanwhile, came from 13th on the grid to finish third despite a back problem.
While Red Bull remain in a class of their own, Lotus trackside operations director Alan Permane feels his squad are ready to challenge their two closest rivals.
"Both drivers did us proud in Singapore," Permane said. "Romain delivered fantastically well in both qualifying and the race despite his limited track time, whilst Kimi overcame his back pain to score an impressive podium finish.
"Like us, most teams will have now switched their development focus to 2014 so we wouldn't expect a dramatic change to the relative performance of each outfit between now and the end of the season.
"That leaves us in a tight scrap with both Ferrari and Mercedes, and with both our guys performing at this level - coupled with the potential from the car at the coming tracks - we should have a good end to the season in prospect."
Next up is the Korean Grand Prix this weekend and Permane feels it will suit the E21.
"There's a nice long straight benefitting the DRS effect, meaning there's a good chance to see overtaking in the race," he said. The layout has a mix of different sections but they flow together well.
"We see some decent straights in the first section followed by a few interesting corners - some high speed - in the second section, before moving into an almost street-circuit feel through the final part of the track with its stop-start nature and close proximity walls.
"Although there are good long straights, the number of high and medium speed corners mean you have to run with a reasonable level of downforce which should certainly be beneficial for us."