Ibrox side Glasgow Rangers are set to take on Celtic tomorrow.
Rangers are set to take on Celtic on Sunday at Hampden Park, in the Scottish Cup semi-final.
The Light Blues are currently undergoing some last minute preparations ahead of what is expected to be a fierce test.
However, due to the strength of Celtic’s squad, Caixinha admits that he isn’t too sure over what line-up Rodgers will name at the weekend.
“We have doubts about their team,” the Portuguese boss said. “The main doubt is whether McGregor or Rogic will play. That’s our major doubt regarding the opponent’s first 11.
“The reality is Brown is going to play and that means they are going with their best players and best squad. I am glad to face them under those conditions to test ourselves.”
Rangers head into their match against Celtic unbeaten under Caixinha’s stewardship so far.
The Portuguese boss has not lost any of his first five matches, but this will be his toughest test.
Celtic have dominated Scottish football this season, and are still yet to taste defeat in any domestic competition.
And if the Bhoys do beat Rangers, they will move a step closer to winning the treble, in Brendan Rodgers’ first season in charge.