The Portuguese confirmed that the 32-year-old has undergone surgery.
Celtic were embarrassed in Brendan Rodgers' first competitive match in charge.
Stoke City striker Peter Crouch has been linked with a move to Newcastle United.
The youngster endured a difficult year in the Premier League last season.
Arsenal could be without a few key players for the start of their Premier League season.
The Tigers' boss is said to be in the running for the job.
Leeds United signed Rob Green from Queens Park Rangers earlier this summer.
Celtic are due to face Lincoln Red Imps in the second-leg of their Champions League qualification tie.
Deutsche Bank have announced that Werner Steinmueller, 62, Head of Global Transaction Banking (GTB), has been designated to join the Management Board and take on a new role as Chief Executive Officer of Asia Pacific.
Sixty is the new 40, 90 is the new 70 and Jennifer Saunders’s Edina and Joanna Lumley’s Patsy are back – along with Edina’s very elderly mum, played by June Whitfield. The less-than-dynamic duo make a characteristically wobbly and hungover reappearance in heels, champagne flutes in one hand and cigarettes in the other. No nonsense about vaping.
Andrew Luck, the Indianapolis Colts’ quarterback, has signed a contract extension through 2021, which, reports suggest, will make him the highest-paid player in the NFL.
John McDonnell has set up a secret group of advisers to help shape Labour’s stance on the NHS, in an apparent breach of the party’s rules and undermining of its policy process.