Celtic transfer news: Martin O'Neill admits he doesn't want to see more of his stars leave as Arne Engels and Alistair Johnston generate interest

Celtic boss Martin O'Neill has reiterated his desire not to lose any more key players during the summer transfer window amid interest in Arne Engels and Alistair Johnston.

O'Neill claimed that an offer had been made for the player, but that it didn't "remotely meet our valuation".

Meanwhile, interest has been growing in right-back Johnston after an impressive World Cup with Canada, and O'Neill revealed that he had spoken with Everton boss David Moyes over a potential move.

"Everton have been in contact," he said. "I'm not sure whether there has been a bid in for that one. In fairness, David [Moyes] did call me last weekend to tell me that there would be contact. But I don't know how far that has progressed, or if it has at all."

It has been a very lopsided window for Celtic thus far, with a total of 14 players leaving the club, including Daizen Maeda to Ipswich, Kelechi Iheanacho to Bursaspor and the end of several high-profile loan deals.