By Matthew Smith For Mailonline
Published: 09:29 BST, 3 August 2017 | Updated: 09:29 BST, 3 August 2017
For the most part, Nemanja Matic's Manchester United debut went smoothly as they beat Sampdoria 2-1 in Dublin.
However there was one unfortunate moment when the Serbian enforcer made a strong challenge near the touchline.
The ball flew out of play at high speed, and struck a female fan full in the face, much to the dismay of Matic.