Neil Lennon has hinted that Celtic are only on the lookout for one more signing this summer as he revealed he's pleased with the business they've already done.

Shane Duffy joined from Brighton on loan while the Hoops splashed out on Vasilis Barkas, David Turnbull and Albian Ajeti. Around £14.5million has been spent in total this summer and the manager is so far happy with his new recruits.

Celts remain hopeful of bringing in a left-back to replace the outgoing Boli Bolingoli and challenge Greg Taylor for his spot. Charlton's Alfie Doughty and Preston's Ben Davies are the two most notable targets.

And Lennon suggested that, if he can complete the signing of a new defender, he'd happily have concluded his business.

"We're working away in the background trying to get the right fit and the right player in the right position," he said. "I'm delighted with the business we've done. Shane has come in and had an instant impact.

"Barkas is settling in very well, Ajeti has scored three goals already with limited time on the pitch. We've still got David Turnbull, he's made his debut, to get his first start, we're delighted with that signing too. And then there's Elyounoussi.

"We've brought in real quality and as time goes by we'll see that manifest itself as we go along.

"It's a different market and not a lot of business being done so in that aspect in terms of bringing players in, like all dealings they're protracted at times but in terms of attracting players here it's been good."