LONDON COLNEY, England, Feb 2 (Reuters) - ‌A 3-2 advantage going into Tuesday's League Cup semi-final second leg ‌at home offers no extra comfort to Arsenal manager Mikel Arteta, who ‌expects in-form Chelsea to pose his team a difficult challenge.

Liam Rosenior's Chelsea have won all five matches since losing to Arsenal in the first leg last month, directly qualifying for the Champions ‍League's round of 16 after finishing sixth in the ‍European competition's league phase and ‌rising to fifth in the Premier League.