The major names in the division include Bernard Hopkins, Antonio Tarver, Glen Johnson and Chad Dawson.
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Benitez will at least be comforted with better news regarding Skrtel's fellow defender Glen Johnson.
Aquilani is Liverpool's second major summer signing after England right-back Glen Johnson joined from Portsmouth.
Glen Johnson then scored his first goal for the club with an acrobatic finish just before the interval.
Liverpool took the lead when Steven Gerrard turned Lee Bowyer to curl in after Glen Johnson's mis-hit pass.
Losing his fight with Calzaghe could leave Glen Johnson in no man's land.
This is to cover money owed to Chelsea and Watford for the signings of Glen Johnson and Tommy Smith respectively.
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Liverpool duo Joe Cole and Glen Johnson were overlooked, although the latter had only recently recovered from a groin injury.
Glen Johnson added a second with a shot that deflected off Turner then turned provider for Torres to hook home again.
Soon afterwards Benitez introduced Glen Johnson for Lucas, as the England full-back returned to action for the first time since late December.
However, Hodgson has been boosted by better news on strikers Fernando Torres and Dirk Kuyt, and defenders Martin Skrtel and Glen Johnson.
England tied it less than 10 minutes later as Hodgson's strategy of swapping defender Glen Johnson for attack-minded midfielder Alex Oxlade-Chamberlain paid off.
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Full-back Glen Johnson will also sit out the final friendly of the club's Far Eastern tour in order to rest his Achilles injury.
Nine minutes from time United's Antonio Valencia seized a wayward Liverpool pass, raced through on the Liverpool goal and was brought down by Glen Johnson.
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However, Jones suffered an even more chilling knockout against Jamaica's Glen Johnson four months later before being outpointed by Tarver in a decider in 2005.
Gerrard then slotted in a penalty after Salvatore Aronica brought down Glen Johnson before the Reds skipper dinked in a third to complete his hat-trick.
Jermaine Defoe was sold back to Tottenham Hotspur in January and it is reported that other star players such as Glen Johnson are up for sale.
Midfielder Niko Kranjcar followed Lassana Diarra, Jermain Defoe, Glen Johnson and Peter Crouch out of Fratton Park after agreeing a switch to Tottenham on 1 September.
Calzaghe, 33, won the IBF title from America's Jeff Lacy in sensational fashion in March but was forced to abandon a defence against Glen Johnson this July.
Liverpool are short of cover at right-back with Glen Johnson out for up to two months with a knee injury, while 19-year-old Martin Kelly is also currently sidelined.
Portsmouth, who have lost key players Peter Crouch, Jermain Defoe, Glen Johnson and Sylvain Distin this summer, made a bright start but City soon got into their stride.
Portsmouth continued to dominate after the break, with Mendes shooting just over the top and Kranjcar coming closest of all when he narrowly failed to turn in Glen Johnson's cross.
Thereafter, only Portsmouth looked like scoring and, with substitute Nwankwo Kanu pulling the strings and Glen Johnson bombing forward down the right, only poor finishing kept Sunderland in the game.
Defoe was again uncharacteristically wasteful after more good work by Glen Johnson and was frustrated again when Ashley Cole's cross fell just behind him in front of an open goal.
And he has joined the trail set by Glen Johnson, Dimi Traore, Sean Davis, Peter Crouch, Sol Campbell, Sylvain Distin and now also Niko Kranjcar in leaving Pompey this summer.
But, after Torres horribly mistimed a shot from Glen Johnson's low cross early on, the Spaniard proved Birmingham's nemesis with the type of saves with which he is more normally associated.
He kept them up last season but lost several high-profile players such as Peter Crouch and Glen Johnson over the summer, and this season the club's ownership has been in doubt.
Glen Johnson thought he had added a third just after the hour mark but his powerful strike was ruled out because Cole - for once the villain - had drifted into an offside position.
Zlatan Ibrahimovic hit the set-piece against the wall before his miscued volley fell to Mellberg, whose shot was parried by Joe Hart only to bounce off Glen Johnson and over the line.
Although, when the Portugal international did drift into the middle, he had a long-range shot comfortably saved before guiding a free header from a Glen Johnson cross straight at keeper Michel Vorm.
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