"I did [have run-ins] but only because of the amount of respect I had for him, because of how much he wanted to win and what a captain he was," said Shearer on last month's Hall of Fame launch show.
Keane, who was captain of Manchester United and won seven titles at Old Trafford, is one of six players from a 23-man shortlist to receive the most combined votes from fans and the Premier League panel.
"The sign of a great captain is when your team is in trouble, you've got 70,000 or 80,000 fans looking at you, you've got millions all around the world looking at you.
"Probably more importantly, you've got your team-mates and your manager looking at you to do something to get us out of trouble."
"Whether that be a tackle, a pass or a goal, whatever that may be and that's what great captains do - and that's what Roy Keane was.
"He was a great leader and he led his team to so many victories, to so many trophies and he epitomised everything great about Man Utd at that time."