Former boss suggests both Celtic and Southampton star could be regretting Stuart Armstrong deal.
Celtic earned three points in their first Europa League group stage match of the season.
Stuart Armstrong left Brendan Rodgers’s Celtic for Southampton in the summer transfer window.
Stuart Armstrong left Scottish Premiership champions Celtic and became the latest Hoops star to make the move to Southampton this summer.
Celtic have failed to replace Stuart Armstrong after his move to Southampton.
Leicester are looking to offload a number of first-team players and Celtic should take advantage.
A brush with relegation last season was a warning for Southampton - but how much have they done to fix the problems that saw the club under such pressure last time around?
Ex-Celtic midfielder Stuart Armstrong has enjoyed an impressive pre-season at Southampton since leaving Parkhead.
Scottish Premiership champions Celtic sold Stuart Armstrong to Southampton and failed to sign Hibernian's John McGinn - what a chance for Callum McGregor
Southampton's Stuart Armstrong starred in their pre-season win today, following his move from Celtic earlier this summer.
Celtic confirmed their progression to the Europa League despite losing at home to Anderlecht. But who were their best performers? And their worst?
Moss has been appointed Huddersfield Town's new director of football after leaving Brendan Rodgers' Celtic.
West Bromwich Albion are the latest Premier League club to be linked with a move for the Celtic Park star.