Chelsea appointed Christopher Vivell as the club's new technical director on Wednesday, replacing Petr Cech who left in June
Petr Cech heaped praise on Wayne Rooney, saying that the former Manchester United star could fight, run and was clever with his shooting.
Petr Cech won 13 major honours, including four Premier League titles and the Champions League, in a stellar 11-year career with Chelsea before joining Arsenal in 2015.
Petr Cech won 13 trophies including four Premier League titles and the Champions League in 11 seasons with Chelsea before moving across London to Arsenal in 2015.
Arsenal must now turn the tie around in the second leg at the Emirates Stadium next Thursday if they are to progress any further in the Europa League.
Petr Cech's final game for the Czech Republic was the 2-0 defeat to Turkey in Euro 2016
Spain were frustrated throughout by the Czechs' stubborn defensive game, which finally fell apart when Gerard Pique got his head to Andres Iniesta's cross towards the back post where he beat goalkeeper Petr Cech in the 87th minute
Arsenal F.C. and second-place Leicester City have 44 points, with Manchester City a point behind in third.
Petr Cech's arrival from Chelsea has been acclaimed as a signing that could turn Arsenal into title contenders, but he was found wanting as Arsenal opened the Premier League season with a home defeat
Petr Cech moved across the English capital last month from Chelsea where he won four Premier League titles and the Champions League in 11 successful seasons.