I won't be expecting Inter to play like Atletico Madrid did against them in the first leg. I think Inter would continue to prefer an attacking game. They are very productive this season so they shouldn't make a big change in their game plan for their own good. They already have a strong defense so they don't need to be afraid of playing like that in the rematch too. Because if they play too defensively Atletico Madrid can have more chances to punish them.
I don't want to say that Inter Milan's goal was lucky because in my opinion Marko Arnautović was in the right position to score the goal, the result of this goal brought Inter Milan to win today's match and they have to prepare for the second leg match which of course Atletico Madrid is also preparing for. avenge today's defeat, at least Atletico Madrid must win on aggregate if they want to qualify for the next round, while Inter Milan is enough to hold Atletico Madrid to a draw and can qualify them for the group but that should not be a reference, Inter Milan must be able to win to qualify for the round next.