Complex sentence: In 2000 he was appointed as national team coach, but in the summer of 2001 decided to leave the job and join Portugal's club Sporting Clube de Portugal, where he won both the Portuguese championship and cup in his first year.
Split into simpler sentences: In 2000 he was appointed as national team coach, but in the summer of 2001 decided to leave the job. Then he joined Portugal's club Sporting Clube de Portugal, where he won both the Portuguese championship and cup in his first year.