Guillermo Enrique Guerrero Alcivar has officiated 54 matches on record, averaging 3.6 cards and 20.5 fouls per game — a balanced official. A player is dismissed roughly once every 4 games, and the spot is pointed to 0.19 times per match. Home teams win 46% of matches under him, drawing 22% and losing 31%. Most active in the Primera A (32 matches). 29% of his bookings come after the 75th minute, with the first card around the 28'. He cards more than 58% of Primera A 2018 referees.