How to in-fight with punches in Muay Thai? (As a southpaw)

Ok im used to being on the outside but in Muay thai you get a ton of lanky guys with long reach and I find them very hard to punch in the face!

Im...

Source: http://www.mmaforum.com/muay-thai-kickboxing/104779-how-fight-punches-muay-thai-southpaw.html

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