City are being linked this week with a move for Blaise Matuidi, who is baulking at committing to new terms with PSG.
A riled al-Khelaifi warned: "Are we afraid of City? No, because if they should contact one of our players, we'll come into conflict with them. And we would contact their players.
"We respect all clubs. But if one wants to try for our players, they must bear the consequences..."
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