Celtic's Alistair Johnston out until October, team considers new defenders

Celtic full-back Alistair Johnston will be sidelined until October due to injury, as confirmed by manager Martin O'Neill. Johnston, who missed nearly all of last season with a hamstring issue, exited the game against Kilmarnock at halftime. O'Neill acknowledged the need for defensive reinforcements ahead of the Champions League play-off second leg against LASK. He is evaluating potential signings before the transfer deadline on September 3. Youngster Colby Donovan has been filling in for Johnston in recent matches.

• 5:28 PMYahoo Sports — Celtic full-back Johnston out until October
• 5:28 PMBBC Football — Celtic to 'have a little look' at defenders with Johnston out until October