Tottenham have hit a poor run of form of late. Would they have been better off if they had kept this 27-year-old?
One man in particular who has struggled is Moussa Sissoko, with Mauricio Pochettino surely hoping he was signing an upgrade on the players he allowed to depart, especially the likes of Nacer Chadli, who has done well since switching to West Brom.
Tottenham's Moussa Sissoko before the match
The French winger, who was bought for big money in the summer, has been awful this term as he brought his form from his time at Newcastle, and not from France, to Tottenham. He has been a hugely contentious figure amongst Spurs' fans who assumed his problems at Newcastle would disappear when he got his move to a club in the Champions League.
However, instead, they have seen Sissoko put in a number of awful performances and limp cameos, which have all but destroyed the fans' faith in his ability.
On the flip side of that kind of form is former White Hart Lane forward Chadli, who has shone since leaving for West Brom. The forward has been hugely influential in the Baggies' climb up the table with Tony Pulis' side looking like a far stronger proposition than last season.
West Bromwich Albion's Nacer Chadli
His good fortunes have seen many Tottenham fans raise the question of why they been stuck with the awful Sissoko, with Chadli leaving for pastures new?
Chadli's performances have irked Spurs' fans hugely, while the stats aren't particularly pretty reading for Sissoko either:
Sissoko has been a monumental disappointment this season while his stats have shown just how ineffective he has been. Mauricio Pochettino seems to not trust the winger who has only played 327 minutes of football this campaign. To make matters worse, he was also banned for a flying elbow in Tottenham's draw with Bournemouth.
Chadli on the other hand has been outstanding for West Brom. He has found the net four times and picked up two assists. West Brom's forward has also beaten his opponent in every other aspect, making 60 final third passes in comparison to Sissoko's 30, while he has 20 final third entries compared to six, and 157 accurate passes to 109. It is also interesting to note that Chadli has lost the ball 64 times, while Sissoko has lost possession the same amount of times in 327 minutes, compared to Chadli's 620 minutes. All the stats point to the fact that the Baggies' forward uses the ball far better and has more of an impact in the opposition final third, something Sissoko has failed to do this campaign.
It is never advised to judge a player after less than 15 games of the season gone, but Sissoko has been so poor that the fans are become more and more frustrated with him. Would Tottenham be higher up in the Premier League and still in the Champions League if they had kept Chadli? It is impossible to know, however, what is obvious is that they are not better off with the misfiring Frenchman.
West Bromwich Albion's Nacer Chadli celebrates scoring