Image source, Getty Images Image caption, Spurs interim manager Igor Tudor looks downcast during the home defeat by Nottingham Forest in the Premier League. Igor Tudor's position as Tottenham head coach is under major threat with the club's hierarchy facing another defining decision. Tudor's failure to rescue a season spiralling into crisis was brought into even sharper focus by the damaging 3-0 home defeat by fellow strugglers Nottingham Forest on Sunday, leaving Spurs one point and one place above the Premier League's relegation zone. The pressure is now on CEO Vinai Venkatesham - previously at Arsenal - sporting director Johan Lange, and the Lewis family, who are over-seeing affairs, as the gamble of Tudor's appointment continues to backfire. Venkatesham, who comes under special scrutiny from fans given his Arsenal links, must get this next move right after Tudor's chaotic reign has brought only one win in seven matches so far.…