Last week's first leg at the Emirates was the only previous meeting between these two sides.
Arsenal have lost only five of their 26 previous meetings with Italian opposition in Europe, and have conceded only one goal in the last seven occasions they have faced an Italian side.
Arsenal will visit Udinese after having failed to score in their two opening Premier League fixtures; the last time this happened to the Gunners was 42 years ago, back in the 1969/70 campaign.
Arsenal have won all nine legs of their five Champions League Qualifying matches to date, including the reverse fixture with Udinese, conceding only two goals in the process.
Udinese have lost three of their last four European games, drawing one.
However, at home they are unbeaten in their last five games (four wins and a draw).
Arsenal's last eight European games away from home have seen them lose six times, and win two; though one of these wins did come at this stage last season at Celtic (2-0).
Last Tuesday at the Emirates, Udinese attempted 18 shots, six more than Arsenal, but hit the target only three times
Eight of these shots were attempted by Antonio Di Natale, who has been the Serie A top-scorer in the past two seasons (29 goals scored in 2009-10 and 28 last term).
Overall, Di Natale has been the most prolific Serie A scorer over the last five seasons with 97 goals in 160 games.
