Chelsea youngster Jimi Tauriainen reached a landmark achievement yesterday by making his first-team debut. Chelsea recorded a much-needed 3-2 victory over Championship club Leeds United last night in the fifth round of the FA Cup. Next, they’ve got another home tie in the quarter finals and welcome Leicester City in mid-March. The Blues kept their heads to respond to the weekends’s disappointment of losing the League Cup final to Liverpool. It’s a trip to local rivals Brentford next in the league this Saturday. Jimi Tauriainen, who’s only aged 19, is going to remember the Leeds tie for the res…