Borussia Dortmund's goalkeeper Roman Weidenfeller (R) argues with Real Madrid's Gareth Bale during their Champions League quarter-final second leg soccer match in Dortmund, April 8, 2014 (Photo: Reuters)

Real's Gareth Bale reacts during the Champions League quarterfinal second leg soccer match between Borussia Dortmund and Real Madrid in the Signal Iduna stadium in Dortmund, Germany, Tuesday, April 8, 2014 (Photo: AP)

Dortmund's Lukasz Piszczek, right, and Real's Gareth Bale challenge for the ball during the Champions League quarterfinal second leg soccer match between Borussia Dortmund and Real Madrid in the Signal Iduna stadium in Dortmund, Germany, Tuesday, April 8, 2014 (Photo: AP)

Real's Pepe celebrates with Gareth Bale, right, at the end of the the Champions League quarterfinal second leg soccer match between Borussia Dortmund and Real Madrid in the Signal Iduna stadium in Dortmund, Germany, Tuesday, April 8, 2014 (Photo: AP)

Borussia Dortmund's coach Juergen Klopp (C) speaks with match officials after their Champions League quarter-final second leg soccer match against Real Madrid in Dortmund, April 8, 2014 (Photo: Reuters)

Match referee Damir Skomina shows a yellow card to Real Madrid's Casemiro (C, 16) during their Champions League quarter-final second leg soccer match against Borussia Dortmund in Dortmund, April 8, 2014 (Photo: Reuters)

Dortmund's Henrikh Mkhitaryan jumps for the ball with Real's Sergio Ramos during the Champions League quarterfinal second leg soccer match between Borussia Dortmund and Real Madrid in the Signal Iduna stadium in Dortmund, Germany, Tuesday, April 8, 2014 (Photo: AP)

Borussia Dortmund's Robert Lewandowski (L) fights for the ball with Real Madrid's Pepe during their Champions League quarter-final second leg soccer match against Real Madrid in Dortmund, April 8, 2014 (Photo: Reuters)

Chelsea's John Terry reacts at the end of their Champions League quarter-final second leg soccer match against Paris St Germain at Stamford Bridge in London, April 8, 2014. Chelsea won the match 2-0 and qualified for the next round (Photo: Reuters)

Chelsea players celebrate at the end of their Champions League quarter-final second leg soccer match against Paris St Germain at Stamford Bridge in London, April 8, 2014 (Photo: Reuters)

Chelsea's David Luiz tries to control the ball during their Champions League quarter-final second leg soccer match against Paris St Germain at Stamford Bridge in London, April 8, 2014 (Photo: Reuters)

Chelsea's Samuel Eto'o, left falls after a tackle on Paris Saint-Germain's Thiago Silva, who he could in the tackle, during the Champions League quarterfinal second leg soccer match between Chelsea and Paris Saint Germain at Stamford Bridge stadium in London, Tuesday, April 8, 2014 (Photo: AP)

Paris Saint-Germain's Edinson Cavani, centre, is shown a yellow card by ref free Pedro Pronca, as Chelsea's John Terry. left looks on during the Champions League quarterfinal second leg soccer match between Chelsea and Paris Saint Germain at Stamford Bridge stadium in London, Tuesday, April 8, 2014 (Photo: AP)

PSG's Lucas, right, and Chelsea's Frank Lampard vie for the ball during the Champions League second leg quarterfinal soccer match between Chelsea and Paris Saint-Germain at Stamford Bridge Stadium in London, Tuesday, April 8, 2014 (Photo: AP)

10ThingstoSeeSports - Chelsea's Demba Ba scores his side's 2nd goal during the Champions League second leg quarterfinal soccer match between Chelsea and Paris Saint-Germain at Stamford Bridge Stadium in London, Tuesday, April 8, 2014 (Photo: AP)

Members of the Chelsea team celebrates in the technical area after thier Champions League quarterfinal second leg soccer match between Chelsea and Paris Saint Germain at Stamford Bridge stadium in London, Tuesday, April 8, 2014 (Photo: AP)

Paris Saint-Germain's Javier Pastore waits to kick off after Chelsea score the second goal of the game during the Champions League quarterfinal second leg soccer match between Chelsea and Paris Saint Germain at Stamford Bridge stadium in London, Tuesday, April 8, 2014. Chelsea advance to the semifinals (Photo: AP)