Manchester City's open training session had a notable absence as they prepared for the Champions League final.
The Citizens, who have already won the Premier League and FA Cup, are chasing a historic treble.
Becoming the second team to achieve the feat after rivals Manchester United is very appealing, as City chase their first ever European trophy.
Per The Mail, Kyle Walker was not involved in City's training session on Tuesday.
Manager Pep Guardiola told reporters: He has had a little bit of a disturbance in his back.
Yesterday he was not good, today he was a little bit better but we didn't want to take any risks. We will see in the next days."