Argentina Primera A

Messi, Ronaldo back in Champions League action

The Champions League is back this week with the remaining four first-leg matches in the round of 16:

Lionel Messi is back in top form going into the game, giving Barcelona extra hope it can leave behind the off-field problems that have hurt the club this year.

Messi ended a four-game scoreless streak with a four-goal performance in the team's 5-0 rout of Eibar in the Spanish league on Saturday at the Camp Nou.