Nainggolan is a central midfielder who has been on the transfer radar of Milan, Inter, Juventus and Roma in the past.
Astori, meanwhile, is an Italian international centre-back who has been linked with the Stadio San Paolo outfit on a regular basis over the last 24 months.
The 23-year-old Ibarbo is a Colombian attacker who has been linked with Italian champions Juventus in recent days.
Juventus are keeping an eye on Xabi Alonso’s contract situation at Real Madrid seeing as he may be available on a Bosman next summer.
According to Tuttosport, the Spanish international could be the Italian club’s latest high profile free agent signing should he not pen an extension at Real.
The former Liverpool playmaker, who will be 32 later this year, was originally wanted by the Old Lady in the summer of 2008.
However, the Turin giants eventually opted to sign Danish international Christian Poulsen from Sevilla instead.
Alonso could be used as an alternative to Pirlo next season seeing as the Italian will be 35 by the time the 2014-15 campaign starts.
Milan don’t have the money to sign Astori or Davide Santon, the agent of the two players has stated.
The Cagliari centre-back, also wanted by Napoli, has been paired with a possible move to the Diavolo this summer.
“He is certainly a player who they are interested in,” Renzo Contratto told Milan News. “But if there are no finances available then a deal can never happen.”
The representative also looks after the interests of Newcastle’s Santon, a full-back who the Rossoneri wanted in the past.
“There was an attempt for him in January,” Contratto continued. “But, in this case too, nothing occurred because of a lack of funds.”
Parma are showing an interest in available Fiorentina and Italy defender Mattia Cassani.
The right-back doesn’t feature in the plans of Viola boss Vincenzo Montella and the 29-year-old is expected to move on.
The defender joined the Tuscan giants in the summer of 2011 after five years with Palermo. He spent the second half of last season on loan at Genoa.
Cassani, one goal in 34 League games for Fiorentina, has been capped by his country on 11 occasions.
Turkish side Besiktas reportedly have Milan defender Luca Antonini on their transfer radar.
Antonini’s future is somewhat uncertain given that he has less than a year left on his current deal with the Diavolo.
The 31-year-old is a product of the Rossoneri’s youth system, however, he didn’t get a first team chance until 2008 after spells with eight different clubs.
The left-back has had his injury problems in recent times which have limited him to just 26 League games over the past two campaigns.
Milan could potentially lose the player on a Bosman next summer should he not put pen to paper on an extension before then.
Napoli could take advantage of the chaos at Anzhi to reinforce their attack with Samuel Eto’o.
The Partenopei have been looking for another striker after Gonzalo Higuain, but ran into problems for Porto’s €40m-rated (£34m) Jackson Martinez.
According to Italian transfer expert Alfredo Pedullà, the situation at Anzhi has placed an intriguing proposition into their lap.
The Russian club has put the entire squad on the transfer market, as confirmed by Chairman Constantin Remchukov.
“The truth is that we will be reformatting the way Anzhi is run. Many expensive players will leave. The budget will be $50m-$70m a year (£32m-£46m).”
Eto’o joined Anzhi in August 2011 and became the highest-paid player in the world at €20m (£17m) per season after tax.
The 32-year-old Cameroon international would still be a costly proposition for Napoli right now, but at €20m (£17m) considerably more affordable than their alternatives.
Wages are another issue, although it is possible Eto’o would take a pay cut for a return to Serie A, where he won the Treble with Inter, and the Champions League.
Julio Cesar’s agent has warned he won’t join Fiorentina or any other Serie A club unless they offer “a four-year contract.”
Today the Viola insisted they had never made a proposal for the QPR goalkeeper, who already failed to agree personal terms with Napoli last month.
“I never had contact with Fiorentina, but I did send a close friend to speak to the Viola. For now there is no news,” agent Cardoso told Radio Blu.
“QPR would have no problem letting him go to Fiorentina or to any other club, but if the €3.2m (£2.8m) don’t arrive then it’s difficult to close the deal.
“The move can be made only if we are offered a four-year contract. He has a contract with QPR until 2016, so it has to match that date.
“The length of the contract could compensate for a difference in wages, but if it expired earlier than 2016 then it would be pointless.
“Julio Cesar likes Fiorentina, so they could be the right team for him to target a World Cup spot.”