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Tottenham<\/b><\/a> forward Richarlison has been ruled out for up to seven weeks with a hamstring injury.<\/b><\/p>\n The 28-year-old is Spurs’ top scorer this season with seven goals in 21 Premier League games.<\/p>\n Thomas Frank’s side host West Ham<\/a> in a London derby on Saturday (15:00 GMT) and have won just one of their past seven matches in all competitions.<\/p>\n They were knocked out of the FA Cup by Aston Villa<\/a> at the weekend and are currently 14th in the top flight.<\/p>\n Midfielders Lucas Bergvall and Yves Bissouma are back available, while full-back Destiny Udogie and striker Dominic Solanke could be involved against the Hammers.<\/p>\n Spurs have signed England midfielder Conor Gallagher, 25, from Atletico Madrid for \u00a335m with Frank hailing him as a “top signing” who is “exactly what we need”.<\/p>\n “First and foremost he is a very good player, great experience in the Premier League, also in La Liga, captained teams,” the Dane said.<\/p>\n “So that character, that leadership, that experience, and still young with plenty of development to reach, but coming in at a good level, bringing his pressing abilities, his directness, scoring goals, but also being able to find good positions on the pitch.”<\/p>\n On Thursday Spurs announced former Netherlands and Everton<\/a> defender John Heitinga has joined the club as an assistant coach.<\/p>\n<\/div>\n