By alley - Apr 15, 2016, 5:32 AM ET

F1: Ferrari only strong on super-soft - Raikkonen

Chinese Grand Prix Friday practice pacesetter Kimi Raikkonen admits Ferrari only has strong pace on the super-soft tire after day one of the Shanghai Formula 1 weekend.

Ferrari appeared to be in good shape on raw pace as

Raikkonen led Sebastian Vettel in a one-two for the team on Friday afternoon

. But Raikkonen's discomfort with the car's handling on the other two tire types left him uncertain about his chances.

"It's been quite a tricky day. I don't know if it's the conditions or the wind or something but I was sliding a lot and obviously not feeling very nice," he said. "Once we put the super-soft tires on we have more grip from the tires and that helps.

"For whatever reason we've been quite struggling apart from the super-soft tire. Our car is nice but it's just the other tires are very difficult to get any grip from. But I had a pretty OK lap and the long run on the super-soft was OK."

Tire wear is notoriously high at Shanghai, and Raikkonen admitted that the medium compound that is likely to be the main race choice was a question mark for Ferrari.

"I only used the medium in the morning and it didn't feel very good but also the soft didn't feel great and then the super-soft was the best so far," he said. "The wind conditions are making it very tricky and hard to read."

Teammate Vettel summarised Ferrari's day as "decent" with room for improvement.

"Overall I think we can still improve, but the balance is not yet where I want it to be, so let's see what we can do," he said. "Friday is not that important in terms of position, it is more in terms of feel.

"The feel is OK but OK is not good, so we can still improve the balance of the car and work tonight to try to get on top of it."

Originally on Autosport.com