With Paris Saint Germain declaring they have won the race to sign Brazilian Lucas for a club record fee, speculation has been rife that the Reds are stepping up attempts to land the Arsenal captain. Although the Gunners would clearly prefer to sell to a club outside of the Barclays Premier League, Sir Alex is hopeful a deal can be struck.
"I can't give you any more information," said the boss when asked about van Persie after United's 0-0 draw with Barcelona. "We have made a bid and they've been trying to negotiate with other clubs. We just have to persevere. Hopefully it will come our way. We're trying our best but there's no progress at this moment in time.
"I don't have a gut feeling on it at the moment, I must admit. We're not getting any breakthrough with Arsenal. It's difficult to say why they're operating this way. I don't know what their thoughts are because they're not giving anything away."
Regarding Lucas' move from Sao Paulo to Paris, it is further evidence that the cash-laden PSG mean business in the transfer market.
"I find it quite amazing that a club can pay €45million for a 19-year-old boy," Sir Alex continued. "To make a mark on everyone - to tell everyone that PSG are here - they've signed Thiago Silva from Milan and Zlatan Ibrahimovic.
"They must have spent about €150million in the last month. As you know, the only deterrent to that is UEFA. In the conditions of European football, you don't qualify for Europe by winning the league or coming second - you only get in by invitation. That's where, hopefully, UEFA can have some power. When somebody's paying €45m for a 19-year-old boy you have to say the game's gone mad."