Niasse joined us in January. He'd apparently played in Russia until December, so he'd missed at most a few weeks. How long exactly does it take for a professional sportsman to regain fitness? Far from being "forced into the first team" Niasse didn't even appear on the bench until late February, when he had five minutes or so against a weakened Bournemouth team with us 2 - 0 up. A handful more substitute appearances followed, mostly of a few minutes' duration, before making his full debut at the end of April. In these admittedly brief appearances, Niasse has shown absolutely nothing to justify the huge fee he cost.
So, to sum up; Martinez spent a fortune on a player who was so drastically unfit that it would take months to get him to speed, that is, so unfit it would have precluded him passing a medical; or one who just doesn't have it in him to play football at Premier League level.