1. Introduction to Guendouzi and his impact on Marseille

2. Overview of Marseille's current performance and status

3. The significance of Guendouzi in the team's title contention

4. Analysis of how Guendouzi's contributions have helped Marseille

5. Potential future development of Guendouzi within the squad

6. Conclusion and future outlook for Guendouzi and Marseille

7. References

I hope this helps! Let me know if you need any further assistance.