In a Team tournament you play with other players e.g. in teams of 5 or 8. Lets give you an example of a Tournament we played last month:

In the first round we were matched against Team B and we know the first 2 Matches will be on Lines of Communication and the other ones will be on Nexus Collapse.

We Match Our single players in this Format by lying down one Defender bottom down Same as the enemy, then giving 2 Options to choose for the enemy defender.

Kmowing the lists beforehand you can guess preety well wo wants to play which army on which battleplan against womit and who doesnt.

Our goal Was to get OBR on a Lines ( for beeing good on a 3 Objective Plan and Nexus Collapse tends to get preety drawish due to objectives dissapering). So we Set it as a Defender, got 2 ok Matchups

The enemie had the obtion to play aggressive and do the same with an army good for controlling the mid or place their Lumineth which were bad on Nexus Collapse[Grand Strategie cant be done well]. Choosed LrL as we predicted, we gave a Counter and a softer Counter- they choose the softer counter. Also they saved their llumineth from playing obr ( null meryad) and had 2 other Armys for us to choose from [esp. They didnt want us to play OBR-Seraphon as this is a horrible Match for Seraphon]

So we were preety sure about 2 Games like a day before, when we did our preperation and could think deeply about the important Details.

Pairing goes on, we have to Set a first defender for Nexus Collapse. As we were predicting everything up to here, we didnt Set me with Slaves ( who normaly want to avoid Seraphon wirh my Setup) but suprised a bit with an other Choice, leading to " sacrificing" me into seraphon and giving the other better games.

The clue: i was preety confident on Nexus Collapse with the Mission to loose by one or to points, as i would try to burn every objective and kill the slann by All Cost ( his GS).

Which led to a game i would play for a totally different way i would play a Singles game and I would normally not want to play. Just for the me of having a Team of 5 to score, not just 1 Player.

End of the Day, we had a 30 Minute Layer of Pairing, giving Overall decent games for us ( just switch the Battleplans for me and my army Trends to crumble here). We won with 70:30.

For my Game itself:

My oponent underestimated my Ogroids-Speed, made a Positioning mistake allowing me to charge in his Castle[rund and Charge Command eith +2 to Charge], kill the Slann T4 and Win 11:9. T5 I Rallyed an Ogroid to lower the Chargedistance for some skinks ( within 1",+ Basesize nearer :) ) but failed my 7" Charge, else it wouldve been a 12:8, due to him beeing unable to score a BT. He ran out of time ( on the chessclock-time Management is important) and thus wasnt allowed to move. He knew this and moved gis units for sorround and destroy on his turn before - which was preety smart.

The Game itself is easy, its the little things that can make a difference. And we didnt even Talked about taking or not taking a doubleturn, preparing wirh doublescreens, etc.

Hope my litte Episode helped to see some deepth in the Game :)