Complex sentence: Feng came close to signing with AC Siena during the summer of 2008, Sporting Director Mr. Manuel Gerolin checked all Chinese Olympic matches and was impressed by Feng, but problems with extra-UE player's registration delayed this possibility.
Split into simpler sentences: Feng came close to signing with AC Siena during the summer of 2008. Their sporting director Manuel Gerolin checked all Chinese 2008 Summer Olympics matches and was impressed by Feng, but problems with the player's registration delayed this possibility.