Captain Johnny Sexton admits he instantly regretted the heated exchange with referee Jaco Peyper which caused him to miss Ireland's Rugby World Cup warm-up matches through suspension.Fly-half Sexton was hit with a three-match ban for misconduct for his behaviour following Leinster's Heineken Champions Cup final defeat to La Rochelle on May 20 in Dublin.The 38-year-old, who did not play in that match due to injury and is set to retire after the upcoming tournament in France, says the incident was

Captain Johnny Sexton admits he instantly regretted the heated exchange with referee Jaco Peyper which caused him to miss Ireland's Rugby World Cup warm-up matches through suspension.Fly-half Sexton was hit with a three-match ban for misconduct for his behaviour following Leinster's Heineken Champions Cup final defeat to La Rochelle on May 20 in Dublin.The 38-year-old, who did not play in that match due to injury and is set to retire after the upcoming tournament in France, says the incident was a "mistake in the heat of the moment".He was on Sunday afternoon confirmed in Andy Farrell's squad for the World Cup and is likely to make his return in his country's Pool B opener on September 9 against Romania in Bordeaux.