The Vitesse midfielder is being courted by the rival west London clubs and has travelled to England to view their facilities but remains coy on his future
The Eredivisie midfielder, 23, was one of nine uncapped players on the provisional squad list of 36 for the Netherlands ahead of Euro 2012 but missed out on the final 23.
The former Ajax youth player has just one year left on his contract with his current club and is likely to move this summer, but remains cagey over his future.
“It was impressive,” Buttner told Voetbal International. “Everything is organised very professional and the people I've met were very nice. I had some good conversations.”
Craven Cottage is reportedly Buttner's favoured destination, but German side Werder Bremen are also believed to be vying to secure his services.
“The Premier League and Bundesliga are both great competitions,” the player admitted.
“I've still got a one-year contract at Vitesse, so clubs first must agree on the transfer wage.”
Buttner’s agent, Alexander Bursac, revealed the priority is to ensure the midfielder’s talent is highly valued wherever he plies his trade this coming season.
Bursac said: “The most important [thing] is that Alexander will play next season. He wants a big competition so you've never got a guarantee on a spot at the first XI. But he needs some credit at his new club.
“It's now up to the clubs. But I expect the deal will be done.”