By Matthew Cooper Liverpool captain Virgil van Dijk has named former Arsenal and Chelsea striker Olivier Giroud as his toughest opponent, admitting the 37-year-old “always manages to score” against him. Giroud is widely considered to be one of the most underrated players of his era, despite winning the Champions League, World Cup and Euros in an illustrious career that has seen him overtake Thierry Henry to become France’s all-time leading goalscorer. However, Van Dijk is well aware of Giroud’s quality, ranking him as the toughest attacker he has ever played against in an interview with France…