European fortress Allianz Arena
FC Bayern boast an excellent home record in the current Champions League campaign, as Germany's biggest club have won all five of their matches in Munich with an impressive 19 goals scored and only one conceded. Only Real Madrid (24) and Barcelona (20) in 2011/12 have scored more. In their last three Champions League home fixtures, FCB have achieved results that would at minimum keep the door to the final open against Barcelona: 3-0 against CSKA Moscow, 7-0 against Shakhtar Donetsk and 6-1 against FC Porto.
Do it like Deportivo?
In the history of the Champions League only one team has managed to progress to the next round after losing the first leg of a knockout tie by more than two goals. In 2003/04, Deportivo La Coruna fell 4-1 to AC Milan in the first meeting but won the return 4-0. In this season's quarter-finals against FC Porto, Bayern turned round a two-goal deficit from the first leg for the first time. As for Barça, the Catalans have never been knocked out of a European competition after taking a three-goal margin with them into the second leg.
Barça good on the road
Barcelona will travel to Munich in confident mood, and not only due to their 3-0 win at Camp Nou: the Spanish champions-elect are undefeated in 14 straight away games, winning 13 and drawing one. Messi & Co's last defeat on the road came more than four months ago.
No wins in Munich
Barcelona have visited Munich four times in the past but have yet to win in the Bavarian capital, with two draws and two defeats so far. However, their away record against German teams is good: the Catalans have won nine of 23 matches, with eight draws and six defeats. Most recently, Barcelona suffered a heavy 4-0 defeat to Bayern in April 2013 -- a repeat of that result would be enough to salvage the tie for Thomas Müller and his team-mates on Tuesday night.
Clattenburg in charge
Mark Clattenburg from England will referee Tuesday's Champions League clash between FC Bayern and FC Barcelona. Clattenburg has taken charge of matches involving Bayern twice in Europe's elite club competition: the 2-0 quarter-final success against Juventus in April 2013 and the 7-0 victory over FC Basel in the 2011/12 Round of 16. As for the Catalans, the 40-year-old match official refereed their 3-1 quarter-final first leg victory away to Paris St. Germain a few weeks ago.