ויאבק איש עמו - Rashi says in the name of Chazal that who was this "man" that wrestled with Yaakov? The שר of Esav.
How do they know that? Earlier we read "וימצאהו איש" - A man found him. Asks Rashi: Who was this man? The angel Gavriel. So maybe the "man" of ויאבק איש עמו was also Gavriel?
Maran Rosh HaYeshiva ztz"l: Afterwards it says "ויאמר שלחני כי עלה השחר" - Send me away because it is dawn. Rashi - "And I have to say Shirah by day". He is with Yaakov, why does he have to leave in order to say Shirah?? It must be the שר of Esav...
