"The form of the players sometimes change, it is hard to explain", Pochettino told reporters in his post-match news conference. I can not guess [what will happen].
"We couldn't sign for different circumstances, but we wanted to sign".
Erik Lamela's goal condemned West Ham to a sixth Premier League defeat of the season but they certainly had their chances to earn at least a point, with Marko Arnautovic forcing three good saves from Hugo Lloris.
"Now January will come and we're going to try to sign".
"Nobody is happy with the result but I think everyone values the way we are playing".
"We need to try again in January or the summer if we want to move on the team and the club".More news: Antarctic ice shelf 'sings' as winds whip across its surface
Lamela, who missed more than a year until last November after operations on both hips, has now scored five goals in seven games.
Spurs' victor at West Ham came when a Moussa Sissoko was converted by Erik Lamela and Sissoko, who has struggled to win over the Spurs fans since arriving from Newcastle, got a standing ovation when he was substituted in the second half.
"But if you can not achieve what you need or want, [making signings] because you need to make happy people or act like all the clubs, I think that is not common sense". "We believe in him, we trust in him".
"I think he's a very honest, professional player", Pochettino said. More recently they have been supposedly softened by the absence of a handful of their most important players. "There are a lot of games ahead and it's so important to have almost all the squad fit to compete and play and to give options to rotate and share the games", Pochettino added.
Yarmolenko he appeared to be in some discomfort as he was stretchered off the pitch and Pellegrini admitted that losing the 28-year-old would be a big blow given West Ham are already without a number of midfield players through injury.
Pochettino has stated that this is his toughest season at Spurs, largely due to the late return of key figures after the World Cup - but he hopes the challenges his players have been facing will help them to improve their fortunes at this stage of the campaign.