This situation in this game was very simple for Rijkaard or Tony Twain.
Without too many calculated and ever-changing complicated tactics, the situation was clear — Barcelona needed to attack and score in the away game and they had to make sure they won the game. Only then could they qualify to advance.
By all accounts, if Nottingham Forest lost to Barcelona 0:1, they would also be guaranteed access to the top eight, but this clearly would not sit well Twain's character. A team with this kind of mentality would surely perish in the end. He used to be a Chinese football fan. That kind of thing had happened so many times to the China football team that it had become a cliché. Therefore, Nottingham Forest's mission was simple: win the game at all costs and advance to the top eight.