"In defence, Milan are sorted. We have taken Mexes and Taiwo," Allegri told a news conference on the eve of their Italian Cup semi-final second leg at Palermo.
Nigerian left-back Taiwo, who the Rossoneri are trying to sign as an EU player if he can gain a relevant passport, will fill the only troublesome spot in Milan's line-up this term.
Milan's ageing squad is in need of renewal despite their scudetto triumph and a possible first league and cup double.
"When the season is over we will talk with the club," Allegri said of Pirlo's situation while responding to questions about media speculation linking Milan with former playmaker Kaka - now at Real Madrid - and Santos's Brazilian youngster Ganso.
"The first has won everything in his career and the second must still learn a lot," Allegri said.
