The Everton-owned winger played alongside Grealish at Aston Villa.
Aston Villa manager Dean Smith has been without playmaker Jack Grealish since December.
Aston Villa have struggled to prove their worth in recent weeks without their star man Jack Grealish
The 23-year-old posted a throwback photo of himself with a friend at Villa Park and fan response ranged from praise to good-natured banter.
Derby County defender Curtis Davies seems to rate Aston Villa star Jack Grealish highly.
Jack Grealish has not played for Aston Villa since their 2-2 draw away at West Brom in December.
The Villa winger is edging closer to a return to action but has been active in supporting his club and teammates on social media while out.
Jack Grealish has been on the sidelines since Aston Villa's draw with West Brom in December.
James Chester and Jack Grealish missed Aston Villa's goalless draw against Reading on Saturday.
Aston Villa are reportedly keen on Nottingham Forest's Joe Lolley.