When you buy players they come with 80% condition so they're rested if I have to do training. The new 'keeper conceded two goals in his debut away in the League against a +5%Q team (lost 1-2 after going ahead in the 2nd minute), and kept a clean sheet (3 saves and got MoM) in the CL away match this evening - a 2-0 win. The new ST has three goals from 3 matches.
It depends but I can tell you that such a goalie is pretty reliable. Especially, if you watched the match and can tell that it was not a cheap goal.