Kieran Tierney potentially leaving Arsenal for Newcastle United would limit the Gunners' options.
That is the view of former Arsenal captain William Gallas who claims a side like Mikel Arteta's must have multiple 'quality players' in each position if they are to continue their plight for success. Arsenal are in a healthy position to capture what would be a historic English Premier League title but Scotland cap Tierney hasn't play a diminished role this campaign.
The 25-year-old has been second fiddle to Ukraine star Oleksandr Zinchenko and has seen the promise of game time dissipate in recent months. The former Celtic star has made over 100 appearances at the Emirates since making the big switch from Parkhead but Gallas insists Arsenal would miss the 'competition' the defender brings currently.
