While the inclusion of some players hints at positive news on the injury front, the absence of captain George Honeyman has proven to be a surprise among supporters. But who are the players on the plane? Scroll down and click through the pages to see who Ross has decided to name in his travelling party:
13. Jack Baldwin
The trip could be a crucial one for Baldwin, who will be looking to keep himself in Jack Ross' thoughts. Photo: Frank Reid
14. Tom Flanagan
The Northern Irish international once again looks set to be a key player for Sunderland this term. Photo: Frank Reid
15. Max Power
Currently injured, Power's inclusion could hint that he is taking some positive steps in his recovery. Photo: Frank Reid
16. Charlie Wyke
Similarly to Grigg, Wyke will be looking to find the back of the net during the two Portuguese friendlies to avoid a similarly slow start to last season. Photo: Frank Reid