Jarno Trulli says Toyota will have to be at their best if they want to finish in the top six at this weekend's Turkish Grand Prix.
The Italian has nine World Championship points to his name after finishing fourth, sixth and eighth in his last three races.
Trulli believes qualifying in the top 10 will be key to his hopes of finishing in the top six in Istanbul.
"I am confident again because we showed in Spain that we are quite strong, but we also saw that we have to perform at our maximum if we are to get into the top six," the veteran said.
"The fight is so close that small variables can make a big difference to the end result so we must keep pushing hard.
"We have been competitive on every circuit so far this season so we should expect to be qualifying in the top 10 and scoring points again.
"I am determined to get another positive result this weekend and I believe we are in a strong position to do that."
Team-mate Glock, who is yet to pick up a point this season, is hoping for a change in fortune.
"Our car has looked competitive so far all season and we have more improvements for this weekend, which shows how hard everyone is working," the German said.
"Spain was a difficult weekend for me so I hope in Turkey we can have a bit more luck and fight for my first points with Toyota."
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