Paul Lambert, a former captain of Scottish Championship side Celtic, says the club needs between £8 million and £10 million in rebuilding during this summer’s transfer window.

“Celtic is not a development club, it’s a winning club where you have to win titles. You have to compete.

“You have to compete domestically, and you have to compete in European terms,” says Lambert, who captained Celtic during manager Martin O’Neill’s first spell at the club.

The former captain said Celtic are currently nowhere near good enough without further recruitment – but added that there is no need for “panic.”

Striker Camilo Duran is the sole summer arrival so far for the Scottish champions, while midfielder Alex Oxlade-Chamberlain has signed a new contract after a short-term deal last term.