Jamie McDonnell in boxing for money, says trainer Dave Coldwell

Jamie McDonnell is not in love with boxing and fights purely for money, says the world champion's trainer and manager Dave Coldwell.

The 29-year-old defends the WBA bantamweight title for the third time on September 6 when he renews hostilities with Tomoki Kameda, who he beat via unanimous decision in Texas in May.

But ahead of McDonnell's clash in America, Coldwell said in an interview published on bleacherreport.com: "[McDonnell] is not in love with the sport. He's in love with the fact that he can fight and it makes him money.

"Everyone is driven by something. His passion is earning money for his family - he's driven to do that."

In his pursuit of bigger purses, McDonnell has discussed the possibility of stepping up to face super-bantamweight world champions Carl Frampton and Scott Quigg.

Coldwell said of the situation: "What we've got to do is to see how he makes the weight for this next fight. If he makes it comfortably enough, then we will do another fight at bantam.

Everyone is driven by something. His passion is earning money for his family - he's driven to do that.

"If he can do the weight, the next fight we could do - and the carrot has been dangled in front of us - is massive.

"If you're talking big money for bantamweights, you're talking America. If you're talking nice little defences against people you haven't heard of, then it's back home.

"If that fight [that has been dangled] doesn't come off, however, we will step straight up to super bantamweight.

"The best scenario is - he beats Kameda, has this one more fight at bantamweight, wins that and then moves up and fights Scott Quigg."