ST GEORGE’S, Grenada – A concerned head coach Phil Simmons has urged his batting group for increased discipline ahead of Thursday’s fourth Twenty20 International against South Africa.While the home side won last Saturday’s opener with a brazen show of batting force, similar approaches in the next two matches led to their demise, even though the victory targets were all virtually the same.And even though captain Kieron Pollard has been adamant West Indies would not compromise their power-hitting strengths, Simmons said the hosts still needed to let the state of the game dictate their approach.