Last month, the Argentine football star suffered an injury against Sevilla which made him to miss the Champions League tie against Inter Milan and also the El Clasico with Real Madrid. Messi is included in the squad to face Inter and while he might not start the match, he definitely can play a few minutes.
On the left flank, Philippe Coutinho is likely to be given the nod ahead of the underperforming Ousmane Dembele.
Luis Suarez scored twice on Saturday, the second an 89th-minute victor to complete a late comeback against Rayo.
"Leo is at the point where he could be available, but we have to wait". After not scoring in the first four games of the season, Icardi has scored eight goals in his last eight goals between Serie A and Champions League. "Of course, it is necessary for Messi to recover". "We know they will score many goals together again".
But Rayo, 19th in the table and with only one win all season, fought their way back into the game and midfielder Jose Pozo smashed an equaliser in off the post in the 35th minute. "Under the new coach I'm not being picked but I'm working on it".
Then, Rafinha's Barca future looked bleak but Valverde's preference carries a clear message to the likes of Dembele and Malcom about the value he places on concentration, pressing off the ball and teamwork.
The Catalan giants can clinch top spot in Group B by beating Inter at San Siro on Tuesday, but Valverde is expecting Luciano Spalletti's side to pose a tougher challenge than they did in their first meeting.