MADRID, Spain — Fernando Alonso is not sure if he will stay with Renault after this season.

The two-time world champion, who has had a disappointing year since returning to the French team, said today he'll make a decision after the Formula One season ends.

"I do not know what will happen," the Spaniard said. "The car has improved a little, and I hope that by the end of the year we will get on the podium ... At the end of the year I will have to make a decision, and we will see where Renault is."

Alonso is ninth in the current standings with only nine points. Polish driver Robert Kubica leads with 42 points for BMW Sauber, four ahead of Lewis Hamilton.

Last season Alonso partnered rookie Hamilton at McLaren where the drivers' relationship deteriorated as the Briton continued to chalk up podiums.

In an acrimonious season, McLaren was fined $100 million in a spying scandal and docked all of its constructors points.

Alonso returned to Renault last November without a third straight world championship.