The midfielder was back after months out with a serious hamstring injury.
Guimaraes took to social media after the 2-1 loss at St James' Park, stating: “So many emotions right now! I’m happy to be back after almost 10 weeks.
“I want to thank everyone who was part of my recovery, without exception. I went through one of the most difficult moments of my career, but by the grace of God, I’m back and ready to go again.
“I’m sad about the moment we are currently going through at the club. I think that, for the first time in almost five years that we’ve been together, this has been the toughest period. The only way to get through a moment like this is to keep quiet and work even harder.
"I want to thank everyone for the messages of support during these 10 weeks. Without a doubt, your encouragement was essential in giving me the strength to recover as quickly as possible."