By Tom Gott Chelsea are preparing a formal offer for Napoli striker Victor Osimhen as they brace themselves for a battle to beat Saudi Arabian side Al Ahli to his signature. Blues boss Enzo Maresca has made no secret of his desire to bolster in attack and Chelsea have waited until the final day of the transfer window to try and ramp the pressure up on both Napoli and Osimhen to lower their demands. While Chelsea cannot afford a permanent deal this summer, Fabrizio Romano notes they are now preparing to offer a loan with an obligation to make the move permanent in 2025. Fabrice Hawkins adds tha…