Complex sentence: He ended the season with five goals in 28 league appearances as Bayern Munich were crowned champions of the 1999--00 Bundesliga season, he had also made consecutive Champions League appearances until the semi-final stages where Bayern Munich were knocked out by Real Madrid.
Split into simpler sentences: He ended the season with five goals in 28 league appearances as Bayern were crowned champions of the 1999--2000 Bundesliga season. Santa Cruz had also made consecutive Champions League appearances until the semi-final stages where Bayern Munich were knocked out by Real Madrid.