The Daily Star says he may need a pain-killing injection to play in Englandâ€™s vital World Cup qualifier in Podgorica against Montenegro on Tuesday.
The Liverpool right-back has an infected toe â€“ a problem which bothered him at last summerâ€™s European Championships.
He wasnâ€™t even on the bench for Friday nightâ€™s eight-goal stroll in San Marino.
But England boss Roy Hodgson said: â€śGlen is okay.
â€śIf you remember at the Euros, he had a slight toe problem that we really had to look after and funnily enough, all of a sudden it has recurred.
â€śBut not to the same extent. Itâ€™s an infected toe but thereâ€™s no doubt he could have played against San Marino and we could have had him on the bench.
â€śHowever, it would have meant him having an injection and I preferred him to maintain his course of treatment.
â€śThat way, he didnâ€™t have to put on a boot. It just gives us a couple more days.â€ť