Partey completed his £45 million move to Arsenal on deadline day after the Gunners activated the release clause in his contract with Atletico Madrid.
Atletico, meanwhile, were reportedly unhappy with Arsenal’s lack of communication over their intention to sign Partey in the closing stages of the transfer window.
But Simone admits the existence of the clause meant the transfer was out of Atletico’s hands.
And the Argentine has wished Partey well following his move to the Premier League.
‘In these situations of the clauses we cannot give many opinions,’ said Simeone.
‘They are decisions that are made based on that possibility that exists.
‘As for Thomas, everything that happens to the guys who have given me a lot makes me happy.
‘I remember the games we saw him with the B team and when he started to come through.
‘He will do well and we wish him the best. We love him very much.’