Alam Shearer has been blown away by William Saliba’s performances for Arsenal this season in what is only his second year in the Premier League. The 22-year-old French international has built from his incredible form last campaign with Saliba firmly establishing himself this year as one of the best defenders in all of Europe. Alongside Gabriel Magalhaes, Saliba has played a key role in Arsenal’s Premier League title bid as well as their impressive form in Europe this season in the UEFA Champions League. And speaking to the Premier League’s official website, Shearer lauded the former Saint-Etie…