The 23-year-old scored 11 Premier League goals and 10 more in other competitions, including six in the Champions League. One of these was the winner at Paris Saint-Germain, while he bagged a hat-trick in the home victory over RB Leipzig.
Despite showing his customary coolness when converting a brilliant penalty in the fateful shoot-out, the England international was clearly disappointed with his, and the team's display, and has been understandably saddened by sickening racial abuse on social media.
Following an emotional interview with BT Sport at the Gdansk Stadium, Marcus has had more time to reflect and made another heartfelt post on social media.