LONDON -- AP -- New Orleans Saints quarterback Jameis Winston had said “I'll be out there” for practice on Thursday. He wasn't.

Winston was held out of a second straight practice because of a back injury, raising questions about whether he'll be able to play against the Minnesota Vikings on Sunday at Tottenham Hotspur Stadium in London.

A day earlier, coach Dennis Allen said he anticipated Winston would return to the practice field, and the quarterback insisted he was preparing to start in the NFL’s first international game of the season.

Backup Andy Dalton took first-team snaps again and versatile tight end/quarterback Taysom Hill also got reps behind center at the training facility of rugby club London Irish.

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Allen had downplayed the significance of Hill’s QB reps on Wednesday, when he told the media that Winston just needed “a little bit of recovery.” Asked if he had concerns about Winston’s availability for Sunday, Allen said: “I don’t think so.”

Winston, who has also dealt with an ankle injury, has been sacked 11 times in three games for New Orleans (1-2).

“I’m preparing like every week — preparing to play," Winston said Wednesday. He added that he expected to start against the Vikings: “That’s my plan.”

Wide receiver Michael Thomas also missed his second straight practice because of a toe injury. Receiver Jarvis Landry and offensive linemen Ryan Ramczyk and Andrus Peat returned to practice Thursday after missing the day before.

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