To complement (not replace) what the others have written, the interviewer will be looking for cues to assess (1) how well you understood your role in the team, (2) what was your personal contrinbution to team's results, and (3) what helps explain the quality of your contribution.
It can help to think of a team sport as a metaphor (I'll use football since it's the easiest). When you examine Barcelona's last match, how would you analyze Player X's performance?
The analysis would start with an understanding of X's role (item 1 above): X has/had a very clear role to play in the team (let's say X is left winger: he's supposed to defend from attacks on the left flank and create offensive opportunities by bursting forward on the left flank and kicking balls to strikers in the box); this role differs markedly from other roles in the team (striker, central defender, etc...). The role describes the player's responsibilities i.e., what he is supposed to do. It sounds like you already described your role in your answer
Once you understand the role, you can then talk about how well he performed in his role during the last match (item 2 above). He did really well or poorly in his role (independendly of team performance). For example, we can say he did really well because he thwarted 7 attacks from opponents and created 6 concrete scoring opportunities, 2 of which resulted in actual goals.
Then you can think/talk about why he performed so well (item 3), i.e. the underlying capabilities that underpinned the performance: great placement (always in the right place at the right time), great speed, high passing accuracy, and an intense desire to perform at his best.
Hope this helps :)
Nicolas