Complex sentence: He arrived in Barcelona's first team in July 2008, and eventually made a name for himself as one of the best central midfielders in a relatively short period of time, reaching the Spanish national team less than one year after making his professional club debut.
Split into simpler sentences: He arrived in Barcelona's first team in July 2008, and eventually made a name for himself as one of the best central midfielders in a relatively short period of time. He reached the Spain national team less than one year after making his professional club debut.