Pep Guardiola takes his Man City team to Barcelona and said he did not try to sign Lionel Messi in the summer -- although that could change.
Atletico Madrid coach Diego Simeone and in-form winger Yannick Carrasco faced the media ahead of their clash with Rostov.
Paris Saint-Germain's Blaise Matuidi and manager Unai Emery spoke to the media ahead of their Group A clash with Basel.
Dortmund have accused Sporting of showing a lack of sportsmanship following the Bundesliga side's 2-1 win at the Estadio Jose Alvalade on Tuesday.
Buffon made a string of top saves, including denying Alexandre Lacazette from the penalty spot, before Juan Cuadrado's late strike secured victory.
Napoli could become the first team in Champions League history to qualify after just three group stage games on Wednesday.