Former Northern Ireland goalkeeper Jim Platt is certain Jack Charlton could have led his first club Middlesbrough to even greater success had he stayed longer.
In a glowing tribute to his former boss, who has died at the age of 85, Platt revealed that an early-season dressing down was the catalyst for Boro to storm to the Second Division title as Charlton restored them to the top flight for the first time in 20 years.
Charlton will always be remembered most for his time in charge of the Republic of Ireland when he led them to a major Finals for the first time in qualifying for the 1988 European Championships before reaching back-to-back World Cups in 1990 and 1994.
The foundations of that success were laid at Middlesbrough with Platt in goal when the Leeds United hero took his first steps in management in the summer of 1973.
Middlesbrough won the old Second Division by a huge 15 points, securing top-flight status by the end of March. A year later they finished seventh in the First Division, just five points behind champions Derby County. But by 1977, Charlton was gone and that is something which Platt regrets.
"Jack took over a good team at Middlesbrough, but he made us into a great team," said Platt. "We murdered the Second Division, winning it by 15 points when it was two points for a win. I think we had it won by Easter.
"We only lost four matches that season and two of them were after we'd already secured promotion."
It was after one of those defeats that Charlton revealed a side that his new players hadn't seen before and, thankfully, given the form they showed after, didn't see again - at least for a while.
"We won our first match at Portsmouth, then lost our first home match of the season against Fulham and that was the first time we saw his temper," said Platt.
"We'd a set-to after the match and then we'd a set-to on the Monday as well. He said, 'You'll do it my way or you won't do it at all' and we went 23 matches unbeaten, so he did something right.
"It was his first managerial job, coming off the back of 700-odd games for Leeds United and a World Cup win, so he was somebody we looked up to.
"He'd a bit of a temper, but he was a fair man. He treated his players with fairness. He should have stayed at Middlesbrough longer, but he said when he came that he believed four years would be long enough. I think he said himself in hindsight he should have stayed longer."