Atletico Madrid midfielder Koke said on Monday that the team must face Chelsea in the first leg of the Champions League Round of 16 without any fear, despite having to play in Bucharest, Romania because of travel restrictions preventing visitors from Britain from entering Spain. Atletico arrive for the match after having lost their shine in the Spanish league. Diego Simeone's side rode a scoring streak by Luis Suarez to take a commanding lead but they have stumbled with only one win in the last four rounds. Simeone has moved away from his standard 4-4-2 formation, which Atletico used to topple then defending European champion Liverpool last season. Now Simeone favours a three-man backline and uses two high wing-backs to support Suarez and Joao Felix in the attack. Winger Yannick Carrasco, however, is doubtful for Tuesday's match so that may alter his strategy.