Arsenal have done very well on the player contract front in recent months, tying their stars down to long-term deals. This used to be a weakness for the Gunners, who had a bad habit of allowing their top talents to enter the final year of their contracts some years ago. Arsenal have clearly put this right, and are now moving swiftly and decisively to retain their biggest assets, which is key both on the pitch and in the market. William Saliba, Gabriel Martinelli and Bukayo Saka have all penned new deals with the Gunners across the last 12 months. Ben White and Takehiro Tomiyasu are likely to b…