The British boxer is considering the direction of his career following his comprehensive defeat to Danny Garcia at the weekend.
The 25-year-old was knocked out for the second time in his career with a fourth round stoppage by underdog Garcia during the WBA and WBC light-welterweight unification fight.
Khan says he is determined to reclaim both belts, but admits he will review his relationship with Roach - who also trains the Filipino superstar.
"I want someone who is with me all the way through, like my conditioner Ruben Tabares is," he said.
"It's hard when you're with Manny and have to be the number two.
"Every fight is a big fight for me, I'm fighting top-10 guys and so I need the best guys with me all the way through.
"Now is the best time to sort these things out and my team will talk things over with Freddie.
"There are a few things I have to change to benefit me.
"Maybe we have to see if I'm doing the right training and have the right sparring."
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