Problems with contracting a footballer

Hi players, I have one thing important to you, today I started my career in Lechia Gdańsk and I wanted to get Christian Gytkjaer, who is now a free player. My problem is that I make him an offer, but he also gets other offers from other clubs and takes them every time. Is there anything I can do to prevent other clubs from bidding or to have Christian accept my offer and not other clubs? If you know anything about this, I will be grateful if you help me. I really care about it. I greet you

As in real-life, the better you are as a club and the more attractive the offer you make the player, the more likely it is that he would want to join you over other clubs. Promise him the earth and give him the highest wage possible, for starters.