Angel Di Maria saw red as struggling Juventus fell to a 1-0 defeat at Monza in Serie A, with substitute Christian Gytkjaer scoring a 74th-minute winner.With head coach Ma similiano Allegri not on the bench through suspension, the Bianconeri put in a poor display as Di Maria was sent off for an elbow on Armando Izzo before half-time.The Carmelo Anthony Jersey visitorssloppy performance was punished 16 minutes from time as Gytkjaer slammed home from a Patrick Ciurrias cro s.A first league defeat of the season for Allegris men means they lose more ground on Serie As early pace-setters, adding to the scrutiny ofthe coach.Monza started brightly with Nicolo Rovella, on loan from Juventus, flashing a volley wide of the left post.Izzo mi sed a great chance to break the early deadlock as he headed over from a Marlon Santos cro s, before Patrick Ciurrias side-footed effort Bol Bol Jersey was just off the mark.Juventus struggled to get going, with Dusan Vlahovic finally registering their first shot on target in the 28th minute with a tame attempt that was easily saved.The Bianconeri were down to 10 men before the break, as Di Maria saw red for a petulant elbow in the chest of Izzo as the two battled for po se sion. After the interval, the home sides Dany Mota should have done better when he turned a cro s past the post, before Juventus goalkeeper Mattia Perin made a smart stop to keep out Carlos Augustos powerful shot.The hosts finally got their reward when Gytkjaer Michael Porter Jersey smashed home from Ciurrias deflected cro s to spark wild celebrations from the home faithful.Juventus pushed for an equaliser, but an easily saved Moise Kean header was as close as they came, makingit now five games without a victory in all competitions for the Turin giants.What does it mean? Allegri under pre sure as Juve slip up againDespite playing against Serie As bottom team, the Bianconeri had only 39.8 per cent of po se sion and two shots on target, while Monza generated 17 attempts (four on target) and that all-importantgoal. In terms of expected goals (xG Dikembe Mutombo Jersey ), which gauges the quality of chances and likelihood of scoring, Monza led 2.5 to 0.9, a resounding margin.Glorious GytkjaerThe hosts had the better of the game and Gytkjaers introduction meant they finally got the breakthrough they deserved.After his 55th-minute arrival on the pitch, the 32-year-old hit the target with two of his three shots as his goal earned Monza their first three points of the season.Bad-tempered Di MariaJuve were already struggling in the first half when the Argentina international was sent off for an elbow on Izzo.The frustrated act may have been caused by his and his teams poor performance, with Di Maria winning just one of his four duels and completing just five of seven pa ses in the opposition half before being given his marching orders.Whats next?After the international break, Juventus will host Bologna in Serie A on October 2, while Monza Nikola Jokic Jersey will travel to face Sampdoria on the same day.