Barcelona have agreed to sign Udinese's Chilean forward Alexis Sanchez for 26 million euros ($36.9 million) plus a possible 11.5 million euros in variables as the Spanish and European champions made their first addition to their squad for next season.
Alexis Sanchez hit a hat-trick as Barcelona swept aside Elche 4-0 to return to the top of La Liga on goal difference ahead of Atletico Madrid on Sunday.
Substitute Dusan Tadic fired the only goal as Southampton recorded a first league win over Manchester United for 27 years on Sunday, climbing above them into third in the Premier League.
IMAGES from the Champions League matches played on Tuesday