If you are alone fighting 2 on 1 and the two people wanting to attack walk in a wide circle to flank, focus your attention on the better fighter to encourage him to approach you slowly then, as soon as the pair achieve their wide V and think about closing on you, charge the newbie instead.
Best case, you kill the newbie before the better fighter can close.
Almost as good, you maneuver the swirl of battle in your one on one duel with the newbie so that your better opponent reaches the newbie's back instead of your own.
The counter to this is to not walk in a wide circle and properly flank. (Continued)