The Zimbabwean 29-year-old fired home his fourth goal in three games in the 81st minute at the JJB Stadium to set Pompey on their way to their fourth successive victory.
Redknapp said: "Benji´s scoring goals now which is great. He´s always worked his socks off and done great for us but he´s never really scored too many - and now he can´t stop scoring. He´s always got a smile on his face and now he´s adding goals to his play, which is great for him."
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