Complex sentence: On 21 June 2011, less than a week after resigning as coach of Racing Club, Russo signed a contract to again coach his former club, Estudiantes de La Plata, being his second stint as an Estudiantes coach, having done so in 1994.
Split into simpler sentences: On 21 June 2011, less than a week after resigning as coach of Racing Club, Russo signed a contract to again coach his former club, Estudiantes. This will be his second stint as an Estudiantes coach, having done so in 1994.