Basically I'm a tall and lanky southpaw, train MT. I use the jab alot and often but into later rounds of sparring my jabs and lead hooks become slower/lazier and at this point against orthodox fighters, their cross becomes a problem and is frustrating to counter and defend against. Usually my jab prevents them from throwing or landing it or im quick enough to slip their cross and land a counter hook or cross. In the later rounds when I don't jab as much i find slipping doesn't work so well maybe because of fatigue or because the distance is shortened since i didn't jab as much. Therefore the problem I have is mainly the body cross from an orthodox fighter, and the cross when theyre slightly to the right of my stance so to the side of my lead leg. What should i do?