Celtic manager Neil Lennon is confident his side pose a goal threat against Ajax tonight despite failing to find the back of the net in the Champions League group stages so far. The Parkhead side drew a blank against both AC Milan and Barcelona as they slumped to 2-0 and 1-0 defeats respectively in their opening two group H games. Another loss could see Celtic missing out on an opportunity to progressing in the tournament. However, Lennon insists his team have the firepower to kick-start their campaign tonight.He said: "There is no question we have goals in us. We haven't taken our chances so far in the group stages and hopefully that will change in this game. Creative players cost a lot of money and goalscoring strikers cost a lot of money. But we are doing our best with the personnel that we have to not only create chances but also put them away this time."Celtic came back to draw 1-1 with Hibs at the weekend and Lennon added: "We created plenty on Saturday and I was really pleased with that. We probably should have won the game but we didn't and I'm hoping that will be rectified in this game."Lennon saw tonight's opposition also secure a draw against FC Twente in the Eredivisie on Saturday and said: "I've watched them twice now. They are very confident, they have great belief in what they are trying to do and Frank [de Boer] has great belief in his players. They never panic. They were under pressure at times but they kept playing the same way and they got stronger as the game went on."Kris Commons is out with a hamstring injury sustained at the weekend, although Lennon harbours hopes that Emilio Izaguirre and Mikael Lustig will both be back in contention. However if the latter fails to pass a fitness test, lennon has every faith in youngster Darnell Fisher, who made his debut at right-back at the weekend. He said: "I think his performance on Saturday got overlooked in the aftermath of the game. For a debut, it was very composed, very mature and we were delighted with him. He took his opportunity very well. That gives us a lot of confidence and, as a young player, it gives him a lot of confidence in himself."