Complex sentence: In the following years, he worked mainly with Alavés' B-team; however, on 29 April 2003, he replaced Mané at the helm of the main squad, for the final seven games of the campaign, which ended in top flight relegation.
Split into simpler sentences: In the following years, he worked mainly with Alavés' B-team. However, on 29 April 2003, he replaced Mané at the helm of the main squad, for the final seven games of the season, which ended in top flight relegation.