Some facts courtesy of yahoo sports:
Chelsea are unbeaten in their last 16 clashes with Spanish sides in the Champions League (W6 D10), with their last defeat coming against Barcelona at Stamford Bridge in February 2006.
Atletico Madrid and Chelsea have met four times previously, three times in the Champions League and once in the European Super Cup; both teams have won once along with two draws.
Chelsea are unbeaten against Atletico Madrid in the Champions League (W1 D2); having met in the 2009/10 Group Stages before their 0-0 draw in the first leg of this tie.
Atletico have travelled to England nine times previously in European competition (excluding qualifiers); winning only once (at Leicester City in September 1997, D4 L4).
Atletico Madrid have reached the semi-finals of the European Cup/Champions League for the first time since 1974 when they eventually lost in the final against Bayern Munich after a replay.
45% of Atletico’s goals in the Champions League this season have been scored in the opening and closing 15 minutes of games (10 out of 22).
Atletico Madrid are the only team unbeaten in the Champions League this season (eight wins, three draws).
Chelsea have reached the semi-finals of the Champions League for the seventh time since 2003/04, the joint-highest tally with Barcelona in that time.
Chelsea have only lost one of their last 11 Champions League matches in the knockout stages (1-3 v PSG in this season’s quarter finals first leg).
61% of Chelsea’s goals in the Champions League this season have been scored in the first-half (11 out of 18).
86% of goals conceded by Chelsea in the Champions League this season have come in the second-half (6 out of 7).
Diego Costa has scored seven goals in seven Champions League games (one assist).
This is the eighth time in 10 full seasons as manager that José Mourinho has reached the semi-finals of the Champions League. It’s the third time with Chelsea after 2005 and 2007; however, he’s never made it to the final with the Blues.
Chelsea have never lost a semi-final leg in any European competition at home (W8 D4; in any of Champions League, Europa League, Cup Winners Cup and Fairs Cup).
Chelsea have won their last five Champions League knockout matches at Stamford Bridge, keeping a clean sheet in the last three of these.
Chelsea managed just five shots (inc. blocked) in the first leg. They have only attempted fewer in one CL game this season (one v Basle on 26/11/2013).
MATCH ODDS
Chelsea 13/10, Atletico Madrid 5/2, Draw 23/10.
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