Zlatan Ibrahimovic for Samuel Eto'o
During the summer of 2009, Barcelona were evidently very eager to secure the services of controversial striker Zlatan Ibrahimovic and sent both Aleksandr Hleb and Samuel Eto'o to Inter Milan - plus the small matter of £40 million - in return.
The big Swede endured a difficult time in La Liga however, and spent just a year at the Nou Camp before joining AC Milan in 2010 after falling out with Pep Guardiola. Eto'o, meanwhile, positively thrived in Serie A, winning the domestic title and a Champions League winner's medal under Jose Mourinho.
WINNER - INTER MILAN
A very obvious choice, we're sure you must agree. While Ibrahimovic is perhaps the better player, he just did not adapt at the Camp Nou and it was no surprise when he moved on after just a season.
Eto'o, in contrast, was a valuable asset during his stint at the San Siro before he headed to Russia to join Anzhi Makhachkala.