Shane McGuigan has no feelings of regret about his splits with Carl Frampton and David Haye.
The trainer has also dismissed suggestions he is under pressure to again prove himself.
McGuigan will oversee George Groves' first defence of his WBA super-middleweight title on Saturday, when the 29-year-old fights to reach the semi-final of the World Boxing Super Series by defeating Jamie Cox.
Shane McGuigan has no feelings of regret about his splits with Carl Frampton and David Haye
McGuigan (left) split with Haye (right) following his defeat to Tony Bellew in March
The fight represents McGuigan's first at world level since those splits, which came during a period in which he was established among Britain's leading trainers.
Haye has since worked with Cuba's Ismael Salas and Frampton, having also split from his manager and Shane's father Barry McGuigan, is being trained by Jamie Moore.
Asked if that was a disappointment, Shane McGuigan told Press Association Sport: 'No, not at all.
'The biggest thing is continuing and having respect for one another; not having a bitter taste in your mouth, and there's no bitter taste in my mouth.
'Do I feel I need to prove myself again? No, not at