Kubica - Turkey a one-off

Pole hoping to challenge for podiums in Monaco and Canada

Robert Kubica has downplayed BMW Sauber's drop off in performance at the Turkish Grand Prix, the Pole insisting it was a one-off.

Kubica and team-mate Nick Heidfeld finished a distant fourth and fifth at Istanbul Park, the duo failing to find the pace needed to challenge for a podium finish.

The race was the first this season that saw BMW Sauber out of contention for a podium, with Kubica finishing over 15 seconds behind the third-placed Ferrari of Kimi Raikkonen.

The Swiss-German team started the season with a bang, scoring podium finishes at each of the opening three races.

Kubica also claimed both his and BMW Sauber's first pole position in Bahrain - a race that resulted in the team leading the Constructors' Championship prior to Ferrari's one-two finish in Spain.

However, Kubica is confident BMW Sauber will be back on form at next weekend's Monaco Grand Prix.

"Turkey was a kind of grand prix similar to last year, where we were quite far away from the first two teams but well clear from everybody else," he told Autosport.

"I hope it was only a single grand prix issue, and I hope in Monaco and Canada we can stay closer and fight with McLaren and Ferrari."