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Story summary
- Chelsea manager Liam Rosenior helped secure Valentin Barco's transfer from Strasbourg on a six-year contract.
- Barco excelled in Ligue 1 and is set to be a key Chelsea midfielder.
- Barco earned a recall to the Argentina national team after his Strasbourg stint.
- Chelsea is exploring a transfer for Darwin Nunez, who seeks a return to Europe after Al-Hilal.
- The club is assessing striker options amid uncertainty about current players.
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