Gronk spent Christmas with his mom — and the Celtics

Jessica Rinaldi/Globe Staff

Patriots tight end Rob Gronkowski and his mom at the Celtics game on Christmas.

By Globe Staff 

Tom Bradyand Rob Gronkowski were very much in synch in Sunday’s win over the Bills. (Gronk had five catches, including a terrific one-handed TD grab.) But, judging from their social media accounts, the pair spent Christmas Day differently. While Brady and his bride, Gisele Bundchen, took a snowy stroll near their Chestnut Hill home, Gronk opened presents with his mother, Diane Walters — “Boxers, XxxL Socks & Toothbrushes! What more can ya ask for! Thanks Momma,” he wrote on Instagram — and then sat courtside with her at the Celtics game.