Whatever Tosun does in training affects his opportunities. Assuming he is OK in training then surely a run of 3 or 4 games with a decent level of service to his feet will show whether we have bought a duffer or a decent players. I am glad for Niasse as a person that he has emerged from his football exile under Koeman, but he is definitely not the long term answer. I have seen worse than him, but that is no measure for what should be our standards going forward. I put DCL in a similar category, grossly overrated in the early season, although he played in a terrible team, and just not good enough to be our main striker. Maybe he will develop into one in a few years. Give Tosun a chance; if he fails, bin him and Walsh and try someone else next season.