Palmerston North greyhound trainer Lisa Ahern holds the key to the likely outcome of both open class races at Hatrick this evening.
Ahern, whose constant flow of winners for the season at 344 continues unabated, is lining up three key prospects in the Wanganui Chronicle main 520m event (Race 10).
Mark's Boy stylishly won last Friday's edition of this race and he then went on to take out the Manawatu open class 457m race on Monday - with both wins being delivered in meeting-best times.
His task this evening is slightly tougher owing to him drawing out in trap eight.
A quick break from out there can see him vying for the early pace when heading into the first turn.
