@paok1970,
No, on fire means playing well, on target means hitting the mark with accuracy. A goalie for example is unlikely to be on target, but thy could be on fire. Similarly with a defender who defends well by dispossessing the opponents, he may not be on target either, but he's certainly on fire.
On target normally means hitting the goal, (not necessarily scoring,) less likely to be used for a really well placed cross.