Barcelona star Lionel Messi will undergo a procedure on Tuesday to treat kidney stones, but is still expected to be available for this weekend's visit of Celta Vigo.The Argentina captain was absent from training on Monday, for which the club cited "personal reasons", suggesting he was a doubt to face Valencia in the second leg of the Copa del Rey semi-final on Wednesday.
|Operation: Messi is set to go under the knife on Tuesday|
The procedure is understood to be minor, with Messi able to return home on the same day and expected back in training on Wednesday.
He played 90 minutes for Barcelona in the 2-0 win over Levante on Sunday.
|Duo: Messi and Suarez hit seven between them against Valencia|
They are back in action on Wednesday evening when they travel to the Mestalla to take on under-fire Gary Neville's team.
Barca hold a whopping 7-0 advantage after the first fixture at the Nou Camp, thanks to four goals from Suarez and a hat-trick from Messi.
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