How is the Sunnah of Dhuhr performed on Friday, knowing that the preacher enters the mosque at the time of the Dhuhr Adhan?

The emphasized regular Sunnah prayers are: four rak'ahs before Dhuhr, two rak'ahs after it, two rak'ahs after Maghrib, two rak'ahs after Isha, and two rak'ahs before Fajr.

As for Friday: many scholars are of the opinion that there is no regular Sunnah prayer before it. However, the Hanafis and Shafi'is hold that there is a Sunnah prayer before it, the minimum of which is two rak'ahs and the most complete is four. This is prayed before the second Adhan, not after it.