Five Bosman signings Sunderland boss Sam Allardyce could turn to including ex-Swansea striker Michu

Michu is now a free agent after leaving Swansea City
Michu is now a free agent after leaving Swansea City
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Sunderland boss Sam Allardyce will look to strengthen his Black Cats squad in January.

We take a look at five potential signings, on the day former Swansea City striker Michu became a free agent.

Although Allardyce would have to wait until the January transfer window to sign any contracted players, one road that is open is the Bosman market, with any club able to sign players not currently contracted.

Here are five players that could fill the 25th and final place in Allardyce’s Premier League squad:

1) Michu:

Swansea have parted company with Spain forward Michu by mutual consent - and a host of clubs are looking to sign him.

The move had been expected since last summer when manager Garry Monk confirmed that the once-capped Spain international would not play for the Barclays Premier League club again.

But talks over terminating the player's contract had dragged on until now with both parties seeking to find a suitable settlement.

"Both parties have reached a financial agreement over the remainder of the 29-year-old's contract, which ran until the end of this season," said a statement on Swansea's official club website.

"The agreement will allow Michu to become a free agent and assist him to find a new club straight away in order to kick-start his playing career again in January."

Michu proved an instant hit following his £2million move from Rayo Vallecano in July 2012, scoring four times in his first three games and ending the season with 22 goals as Swansea won the Capital One Cup - the club's first major trophy in 101 years.

Injuries hampered his form at Swansea and he was loaned out to Italian side Napoli.

2) Ron Vlaar:

The Dutch international left Aston Villa in the summer and is still looking for a club despite training with former club AZ Alkmaar.

Captain for the last three seasons at Villa Park, Vlaar could provide the experience that would help the Black Cats defensively - something Allardyce said had to improve before he became manager.

And although plagued with a recent spell of injuries, the no-nonsense centre half could be a clever signing by Allardyce if he can prove his fitness on a long-term basis.

3) Wilson Palacios

The Honduran international has been looking for a club after being released by Stoke in the summer, and would fit into the defensive midfield role at the Stadium of Light should he be needed.

Having played in the Premier League for the last eight seasons for four different clubs, Palacios wouldn’t find any problems fitting straight back into the league with 147 appearances already to his name.

4) Morgan Amalfitano

Having left West Ham last month, the French winger could link-up with Allardyce again at the Stadium of Light.

With recent experience in the Europa League, as well as Premier League experience at West Ham and West Brom, Amalfitano has proved he can be a tricky customer for full backs in the Premier League.

However his discipline seems to have let him down recently, with a huge fall-out with Slaven Bilic leading to his departure from Upton Park without a single league game of football under his belt since the end of last season.

5) Emmanuel Adebayor:

Freed from his contract with Spurs in September, would Allardyce be willing to take a gamble on the Togo striker?

And more to the point would Adebayor be willing to move to Sunderland. The chances of the Black Cats signing - or wanting - Adebayor would appear remote but he does have a strong Premier League goalscoring pedigree and a point to prove.

The former Monaco, Arsenal, Manchester City and Real Madrid forward comes with a fair bit of baggage though.

Worth a short-term deal perhaps? He can sign for a new club from January, having been registered with Spurs at the end of the transfer window.

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