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Leipzig used almost the same roster in the last days of 2016. 12 players, three of which goalies, got Leipzig only one point in the away game against Bad Wildungen (24-24), and their offense was visibly struggling. Today, they will have to do without four of the five long-injured players who didn't play that game. Some of them are injured, some are pregnant, some are feeling sick, so they'll have three juniors in the lineup today.
With only one true started in the back positions, and improvising the rest, we can expect Leipzig to be focused on the defense more and try to use that to get points against the experienced rival.
Oldenburg have good players - two of them are playing for the German national team, one for the Dutch, and a few other experienced players are there to help make Oldenburg an evened out opponent here, or even a slight favorite for the win.
The guests are only missing the back Julia Wenzl, but she's been out since the season began. Oldenburg allowed over 28 goals in four of their nine duels, but the only blunder was against Goppingen (33 goals). Betigheim, Metzingen and Buxtehuder are three best German offenses, and can't be compared to the limited Leipzig.
Another useful option could be the handicap offered for Oldenburg, but the best one is definitely the individual total for the hosts. Details

Portugal have not yet played in big competitions but that was mostly due to tough schedule and close defeats rather than to lack of quality. They beat France last season, lost closely to Germany, Spain, Slovenia. They beat Romania and Estonia before that defeat to Slovenia easily (half time 21-8 and 17-11).

This Turkey is among the worst teams in the generation. They lost all 4 qualifiers apart from complete amateurs from Armenia. For comparisons sake, they lost to Romania 37-30 in 2014. Even more relevant are the games from April of last season when they played a tournament in the Czech Republic where they lost to the Netherlands easily (8-14), to the Czechs 13-13, second half 8-15) and Austria in a relevant game 11-15. Portugal are somewhat better that those teams. Also, the Turks will be without Gulyurt, Bayraktar and Ilgin here and they did rather well in those qualifiers in April.

It all comes down to the fact Portugal are better by 6 goals per half time at least. They will have enough motivation since they are after the first big competitions and want to do well. They covered this easily against Estonia, Romania, who are much better than Turkey. Also, they have key two games coming up in the next two days and they will want to settle this as early on as possible. Details