Do you need a 20-goal striker to secure promotion from the Championship?

A 20-goal-a-season player is sometimes seen as a key to success in football - but how necessary is such a player when pushing for promotion from the Championship?

Well, as it turns out, not very.

Only four of the Championship's title winning teams over the last 10 seasons (40 per cent) have had a player who scored 20 or more league goals during the campaign.

Callum Wilson scored 20 league goals for Bournemouth this season, David Nugent scored 20 for Leicester City the season before, Sylvan Ebanks-Blake bagged 25 for Wolves in 2008-09 and Kevin Phillips score 22 for West Bromwich Albion in 2007-08.

In fact, when Cardiff City won the league in 2012-13 their three joint top scorers had just eight goals each.

Reading in 2011-12 won the league with a top scorer with just 12 league goals, Adam Le Fondre, while Sunderland in 2006-07 won the title with David Connolly as their top scorer on 13.

It's the same story with the second automatic promotion spot, with just four of the runners-up in the last 10 seasons having a player who scored 20 or more league goals.

They were Watford in the season just gone (21), Burnley in 2013-14 (20), Southampton in 2011-12 (27) and Norwich City in 2010-11 (21).

In 2012-13 Hull City finished second despite their top scorer, Robert Koren, having just nine league goals to his name, while Sheffield United were second in 2005-06 with Neil Shipperley as top scorer on 11.

The percentage of teams with a player who scores at least 20 goals drops even further when considering teams that made the playoffs.

Just eight of the 40 sides to make the play-offs in the last 10 campaigns had a 20-goal-a-season man, that's just 20%.

The top scorer of the league champions over the last 10 seasons has scored 17.4 league goals in an average season.

That's one higher than those that finish in second place, 16.4 per season, whereas the average number of league goals scored by the top scorer of play-off placed sides is 15.7.