Celtic boss Neil Lennon has concerns over HJK Helsinki's artificial pitch ahead of the second leg of the Champions League qualifier which the Hoops lead 2-1 from the first meeting.
"I think it is an advantage to any team used to playing on it," said Lennon of the synthetic surface.
"We very rarely use artificial pitches, but we can't use that as an excuse.
"HJK are a good side, they move the ball around well and they have wide players that can hurt you, but I think we can cause them problems as well."
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