While Nottingham Forest bask in the glory of Thursday's victory over Porto in the Europa League quarter-finals, their position in the Premier League means their short and medium-term future remains somewhat complicated. Forest's battling 1-0 win to secure a 2-1 victory on aggregate means they will play Aston Villa in their first European semi-final for 42 years. If results in those games and elsewhere go against them, they could be in the relegation zone by the time that last-four tie with Villa arrives.