Mesut Ozil - Real Madrid to Arsenal
Mesut Ozil's £42.5 million switch from La Liga to North London was unquestionably the biggest deal completed on deadline day. With Gunners boss Arsene Wenger coming under increasing pressure to significantly boost his attacking options, fans are likely to have been largely appeased by such a quality acquisition.
The deal for Ozil is almost three times as costly as Arsenal's previous record signing - Russian playmaker Andrey Arshavin.
Despite Wenger perhaps needing reinforcements more desperately in other areas, Ozil is a hugely gifted playmaker whose departure is likely to disappoint loyal Real Madrid supporters.