Sherwood is currently in charge of the Premier League outfit, having replaced Paul Lambert in the hot seat in mid-February.
This is the Englishman’s second managerial job. The 46-year-old was in charge of North London outfit Tottenham Hotspur for the second half of last season, before getting sacked for failing to lead them to a top-four finish in the league.
Sherwood is doing a remarkable job at Villa, who are now likely to avoid relegation from the Premier League and have also reached the final of the FA Cup.
Keys is impressed with his compatriot’s success at Villa, and hails him for going into management when he could have become a TV pundit like Manchester United legend Gary Neville and Liverpool legend Jamie Carragher.
“But what I like most is that he's (Sherwood) put his head on the block,” Keys wrote on his official website. “Football is in his veins. He isn't sitting comfortably in a TV studio telling everybody else what they're doing wrong. He's out there, putting himself on offer. Backing himself.
“I worry that too many of today's retiring pro's are leaving the game. I've said before that one of my biggest disappointments recently was that Jamie Carragher went that route. He's a student of the game and a huge loss doing what he is now.
“The same applies to Gary Neville. They're good guys doing a very good job, but surely they want to really test themselves at some point? Just like Sherwood is? Good luck to you Tim.”
Neville and Carragher are two of the best pundits in the modern game, and their tactical analysis on Sky Sports is simply superb.
Former United defender Neville also co-commentates on matches, and his analysis and reading of the game is very popular among Premier League followers.
Both Neville and Carragher are respected for their punditry, but perhaps they are right not to become managers - not now anyway.
The job of a manager comes with huge pressure, and many a reputation is destroyed due to a few bad results.
While credit must be given to Sherwood to stay in coaching and becoming a manager, one can understand why the likes of Carragher and Neville have not.