Jose Mourinho expressed his surprise that Chelsea allowed Nemanja Matic to leave for a direct rival after the Serbian impressed on his debut.
Manchester United fielded two debutants in Sunday’s comfortable victory over West Ham, with Romelu Lukaku and Matic both starring.
Lukaku set United on the way to a convincing victory with the opening goal after 33 minutes and headed a second early in the second half. The hosts spurned several chances to increase their lead before Anthony Martial and Paul Pogba finally put a realistic slant on the scoreline in the latter stages.
But while Lukaku grabbed the main headlines, the platform was laid by another new signing, Nemanja Matic.
The former Chelsea midfielder was outstanding throughout and Mourinho admitted he was surprised his former club allowed him to leave.
Asked why he thought the Blues would let such an important player leave, the Portuguese replied: “It depends on what is happening or what was happening behind doors and we don’t know.
“I brought him to Stamford Bridge because I thought he was a player with special qualities and since I left I always thought he could be a perfect player for us.
“I never thought it was possible unless something special was happening and it looks like something special was happening because his agent told me, ‘You can have him, you just have to pay’.
“I didn’t disturb him, I didn’t disturb Chelsea.
“We have him and we are very happy because (he) is a player this team needs.”