No way we would sell Dier and Rose. Dier has been great squad player for us and covers well in several areas. Pops up with important goals at times, too. Plus, he can eat free for life on that west ham winner on his debut. Also, he's Dele's best mate and you wouldn't want to rock that boat unless you think Dele's form won't pick up again (see Moura's 3rd goal in semi if you have doubts).
Rose is back to his best, I can't even consider selling him. That would be nuts. Who on earth would we replace him with? He's home-grown, England international and in great form. If he wants to leave, that's one thing, but no way we should let him go otherwise.
Trippier might be off, but no means certain (he's an important part of the chemistry). If he stays, he needs a great season next season. Can't see him staying for another after that otherwise.
Wanyama might be done. Feels bad, though, he was immense before the injuries. We just need more consistency/quality in that area.
Nando is an achiever, you can't deny it. Great work in the semi and really helped us win it. Can't ask for better in a back-up striker. Keep him (still can't figure out why his heading stats are so high, seems crap to me).
Lamela.... all about the injuries, really. He's got everything but fitness.
Janssen... who? Kidding, hard to see him staying at this point. Doubt he would have been anywhere near the squad but for our 75 bazillion injuries. Must suck for him, but he had an out and didn't take it, apparently. Seems strange, but if he plays his way back in, it would be a legendary piece of commitment. If he doesn't... just a sad footnote.