Messi suffered the injury in an awkward fall when colliding with Sevilla midfielder Franco Vazquez during the 4-2 win on October 20.
However, the Argentine superstar has seemingly made a miraculous recovery from a broken arm to be in contention for Tuesday's return date and has travelled with Ernesto Valverde's squad to Milan.
Barcelona have fared well in Messi's absence, winning their last four matches in all competitions and spectacularly beating rivals Real Madrid 5-1 in the first Clasico encounter of the season at Camp Nou - a result that led to the sacking of Julen Lopetegui.
He added: "The other day [vs Rayo] we started the game very well, but then it was hard for us to play as we did in the previous matches".
Girl Scouts CEO says hearts 'broken' over crash
A Girl Scout troop of seven girls and five adult volunteers were participating in a highway cleanup project on County Road P. It was unclear it Treu was distracted in the moments leading up to the crash, Sergeant Sokup told Minnesota's Star Tribune.
Spice Girls set to reunite for 2019 United Kingdom tour
Reportedly, she is prioritizing her fashion business and has opted to sit out of the festivities. The 43-year-old also admitted she hoped Victoria would join in on some of their dates next year.
Why James Milner was furious with teammates during Arsenal match
The former Real Madrid man played the full 90 minutes for Arsenal against Liverpool in his favoured number ten role. This means he has scored on 49 occasions in the Premier League without suffering a defeat in any of those games.
The reigning Spanish champions scored the first goal in the 10th minute through Luis Suarez who was assisted by left back Jordi Alba.
"We know how many goals Luis and Leo have scored together", Ivan Rakitic said after the match.
"Maybe more aggresive because they're at home. We need to be better in our reading of the game, but we're going to mark space, not men".
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.
"We play with a certain amount of risk, as Barca have always done, but we also want the opposition not to score many", Valverde said when asked if he was concerned about the amount of chances his side are giving up.