The Bianconeri defender believes the two crunch matches will be especially tough as they come so close together
The Bianconeri face their fellow Serie A giants on Saturday at the Giuseppe Meazza before playing the first leg of their Champions League quarter-final three days later against the Bavarians.
And Chiellini believes focus is paramount as they enter a defining stage of their season on both fronts.
"Two major challenges await us and they are close together, and our concentration will need to be at its maximum!" he wrote on Twitter.Juve currently sit nine points clear at the top of Serie A as they chase a second successive title, and reached the last eight in Europe with a 5-0 aggregate win over Celtic.