Peter McGrail methodically defeated the first unbeaten opponent Saturday night that the accomplished amateur has fought since he turned pro after representing England at the Summer Olympics in 2021.

McGrail (8-0, 5 KOs), a southpaw from Liverpool, outboxed Colombian Fran Mendoza and won their 10-round junior bantamweight bout by unanimous decision on the Jack Catterall-Jorge Linares undercard at M&S Bank Arena in Liverpool. The judges scored it 99-91, 99-91 and 97-93 for the 27-year-old McGrail, who almost completely controlled the action against Mendoza (17-1, 7 KOs).

It became clear as they moved into the back end of their bout that McGrail and Mendoza would go the distance, as neither fighter seemed to hurt his opponent at any point.

McGrail nailed Mendoza with a left hand and then a right hook during an impressive sequence with under a minute on the clock in the 10th and final round. Mendoza continued to have trouble catching McGrail with flush punches during those final three minutes.

Mendoza caught McGrail with a counter left hook late in the ninth round.

McGrail snapped back Mendoza’s head with his left hand that connected with a little less than a minute to go in the ninth round. McGrail previously landed a left with just under 1:40 remaining in the ninth round.

A straight left by McGrail connected with about 20 seconds on the clock in the eight round.

McGrail’s right landed to Mendoza’s body with just under 50 seconds to go in the seventh round.

A right-left combination by McGrail backed up Mendoza with just over 45 seconds on the clock in the sixth round. Mendoza, while fighting from a southpaw stance, caught McGrail with a right hook with just over 1:40 to go in the sixth round.

Mendoza drilled McGrail with several jabs during what was a competitive fifth round.

An overhand left by McGrail landed with just under 30 seconds on the clock in the fourth round. A left hand by Mendoza connected with just over a minute to go in the fourth round.

After an unremarkable second round, McGrail drilled Mendoza with a straight left that knocked him off balance with just under 1:40 on the clock in the third round. Mendoza mostly missed with his punches in the opening round, but his short right on the inside knocked McGrail backward with just under 20 seconds to go in the first round.

Keith Idec is a senior writer/columnist for He can be reached on Twitter @Idecboxing.