If you want to sign a contract, you can write to the players. If you write sincerely, it is estimated that the club reply officer can give your letter to the player himself, and then basically get the signature.
You can add some small gifts to the letter, such as Chinese knots, preferably traditional handicrafts from China. It would be better if there were newspaper clippings (or star cards, posters, etc.) about Arsenal or Fabregas. I collected it myself), which means that you have been paying attention to them. The club likes diehard fans very much, and they will probably sign them and send them back to you. Of course, sending these things will definitely increase the postage, but it is worthwhile to spend more money to get the signature.
I wish you success!