Tuchel says he expects his side to "suffer" at times at Old Trafford and admits an in-form Paul Pogba will be one of United's key threats.
In his PSG pre-match press conference, he added: "No, but I would have said yes to the job if we didn't play PSG or in Champions League when United ring you take the chance and you think you can help them".
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Northern Irishman Graeme McDowell is four under after bogeying the final hole at Pebble Beach. He opened with four bogeys in 10 holes and rallied for a 72 at Monterey Peninsula.
On Pogba, Sanchez highlighted the difference in the player's confidence and production since Mourinho was replaced.
"I've said to the boys if we keep working every single day in training, concentrate, we can improve and maybe surprise a few people".
United were 11 points off the top four when Solskjaer took charge in December and, having won eight of their last nine Premier League games, they moved back into the Champions League spots for the first time since the opening weekend. "We're guessing a little bit, but we have a good guess on how to approach this game".
The Champions League round of 16 kicks off on Tuesday with a big one from "The Theatre of Dreams" as red-hot Manchester United hosts a banged-up Paris Saint-Germain squad without Neymar and Edinson Cavani.
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While it seems nearly certain that Cavani will miss the first leg, RMC report that the player's entourage have even suggested the injury may be enough to keep him out of the return leg in the French capital on March 6. "He has contributed to so many chances, so many goals".
Both players will miss the game at Old Trafford, with Cavani likely to skip the return leg as well.
But injuries to Neymar and Cavani, and their opponent's sudden resurgence, have left them with a mountain to climb. "I imagine United will be very bold, play a lot of attack-minded players", he said.
"I am anxious, but only because we are missing key players".
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Khashoggi's remains "after having admitted that he met his death within their custody in their consular premises", she added. It was "unconscionable" that Saudi authorities continued to fail to disclose the whereabouts of Mr.