Arsenal take on an inform Bayern Munich in the first leg of their round of 16 Champions League tie in London this morning (8:45).
Bayern eliminated Arsenal at the same stage last year and then went on to complete the treble of Champions League, Bundesliga and German Cup.
The former Barcelona manager Pep Guardiola took over as Bayern coach at the start of this season and they have lost just once in 34 games, however Guradiola isn't so confident about playing at the Emirates.
Arsenal has the best home defensive record in the Premier League, having conceded just six goals in 26 top-flight matches, and lie a point behind leaders Chelsea.
Milan play Atletico Madrid in today's other match.