Overall, we're supposed to be limiting isolated Tweets from aggregators without citing the source. I've been talking to the modmins about this, but I guess it'll take a bit of time before everything's under control. On the Nuñez Tweet, yes, Galetti is a banned source, and the mods will act accordingly.
The second Tweet is just fine, though. At least we have the quotes and the source provided (though it'd be nicer if the Globo Esporte link was provided in the post). If you have a post from Sport Witness or a similar aggregator with a link/Tweet to the source, then that's fine. If, however, the source isn't clear, then it's not a good idea to post the Tweet.
For example, let's take a look at your Lewandowski Tweet from yesterday:
If you add the source to it, then that's all good: