Tony Sims told Ringside that Kevin Mitchell is "well prepared" ahead of his return to the ring on Saturday night.
London lightweight Mitchell has not fought since losing to WBO champion Ricky Burns in Glasgow last September, but will lace up his gloves at Bethnal Green's York Hall this weekend against France's Sebastien Benito.
Sims trained Mitchell during his amateur days but has recently recommenced his partnership with the 28-year-old and revealed that his charge is looking in fine fettle thanks to some high-quality sparring sessions.
"I think he has lost his way at times during his pro career and that along with a period of inactivity [has affected him]," Sims said of Mitchell, whose only career reverses have come against Burns and Australia's Michael Katsidis.
"Kevin has come back to me now, though, and I can't say anything bad about him; he is a good kid, has trained really hard for this fight and is looking well prepared after sparring with Luke Campbell and Martin Ward."
Former European super-bantamweight champion Spencer Oliver believes Mitchell, who will now fight under the Matchroom banner, has rediscovered his boxing mojo, while Paul Smith - the new holder of the British super-middleweight title - wants to see the Romford pugilist tackle his fellow Brits.
Oliver said: "I think Kevin has got the fire back in his belly - he has signed with Eddie [Hearn] and having spoken to him at the Carl Froch-Mikkel Kessler weigh-in it seems like he has a new lease of life - and I still think he can make a big mark in the professional ranks and win titles."
Smith, who bested Tony Dodson in Bolton on Saturday night to seize his belt, added: "The lightweight division is probably the most exciting in Britain as it is packed out with good fighters all the way down.
"Gavin Rees is not yet done, in my opinion, and imagine what sort of fight him and Mitchell would be, but I would also like to see Kevin, a fighter I would pay to watch, have another crack at Burns when he is at his prime."
Mitchell will be joined on Saturday's east London bill by eight light-welterweight contenders - Danny Connor, Charlie Rice, Ryan Taylor, Matty Tew, Liam Shinkwin, Eren Arif, Tony Owen and Chris Jenkins - all aiming to win £32,000 and the title of Prizefighter champion.
And both Sims - who trains 25-year-old Taylor - and Oliver are expecting a captivating night of entertainment, which you can see live on Sky Sports 1 HD from 8pm.
"This Prizefighter is all about young prospects; there are no ex-British or world champions so everyone has a great chance of winning it," said Sims.
"Ryan has trained very hard for this, though, and can punch a bit as well so I am looking for him to go quite far in the competition."
Oliver concluded: "This competition always throws up the unexpected but this one is really exciting; none of the favourites are meeting in the first rounds so the semi-finals and final could be really interesting."