They say a picture paints a thousand words.

The above still crystallises in many ways the fraught relationship that once existed between Johnny Sexton and Ronan O'Gara.  

The day in question was 2 May, 2009 and the venue was Croke Park.

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Sexton's Leinster thumped Munster in the Heineken Cup semi-final and Sexton is rubbing it in towards O'Gara after a Gordon D'Arcy try.

Time, as they say is a healer, with Johnny Sexton now regretting how bad the relationship with his former Ireland out-half rival became.

Speaking on The Late Late Show on RTÉ One television, Sexton said: "It's one of the regrets I have in my career. I had so much respect for him as a player, even though I didn't know him as a person at the time. We had a few words in the fixture beforehand and that got carried over. I let it come out in that moment.

"It didn't show the respect I had for him and all he had achieved. I was just a young kid, chasing him, trying to be like him.  

"My father was a Munster supporter and I grew up modelling myself on Ronan"  

"I let myself down in that moment. It didn't reflect well on me and it ended up on the front of the papers.

"My father was a Munster supporter and I grew up modelling myself on Ronan."

The reaction from O'Gara's Munster colleagues at the time was not to add to add further fuel to fire, with Sexton adding: "A lot of the Munster players said they respected me afterwards for it because it was a very Munster thing to do. It was probably the Kerry in me that got me into that trouble.  

"Back then it was a 'Munster' thing. Leinster were serial underachievers at the time."

Sexton also admitted that finds it difficult to control his emotions in the heat of battle.

"It's something I'm trying to grips with - those emotions in battle," he revealed.

"It's hard to control those emotions. I'm trying to control it."