Never go back, they say. Jose Mourinho obviously doesn't listen. Having left Chelsea in 2007, he returned in 2013.
Now the Portuguese manager wants to bring back striker Didier Drogba, too, as reported by Simon Jones of The Daily Mail.
The return of an (almost) all-conquering manager is one thing; the return of a 36-year-old striker is quite another. Albeit one who who won three Premier League titles, four FA Cups and the Champions League while at Chelsea.
Drogba has not exactly been setting the world on fire since he left Stamford Bridge in 2012. A short stint in Chinese football with Shanghai Shenua resulted in eight goals in 11 appearances and one season at Galatasaray bore another 15 in 37 games, per Squawka.com.
Chelsea's new £32 million signing Diego Costa need not be worried about his place.
To be fair to Mourinho, he plans to sign Drogba as a second striker, not the lead man, and develop a coaching role for the Ivory Coast international.
But if the Blues' recent history has taught us anything, it's that signing over-the-hill strikers is not the route to success: Samuel Eto'o, £40 million Fernando Torres and £30.8 million Andriy Shevchenko are proof of that.
But is Drogba the right man?
Well, if Mourinho turns to a 36-year-old for cover rather than 21-year-old Romelu Lukaku, who starred on loan at West Brom and Everton over the last two seasons, then they can probably say goodbye to the highly-rated Belgian forever.
Lukaku scored 17 goals in 35 league games for West Brom in 2012-13 and 15 in 31 league games for Everton, per Soccerbase.com, as they achieved their highest-ever Premier League points haul in 2013-14.
He is one of the hottest young strikers in the Premier League, and to jeopardise his future with the club is folly. If he is overlooked once again this season, he will surely move on.
The Drogba decision seems to be based on sentiment. Mourinho's comments ahead of facing his former striker in the Champions League last season indicate such.
Drogba returned to Stamford Bridge with Galatasaray, and Mourinho said it was "destiny" that one day the striker would re-sign for the Blues, as reported by The Daily Mail:
I think destiny will (see him return). Not even destiny, I think a collective desire from the club and from Didier means that one day, sooner or later, as a player, a coach, as an ambassador, as a board member, and because of the respect between him and owner.
And while the sentiment is admirable, David Moyes proved at Manchester United last season that signing up former players to the coaching staff doesn't necessarily bring success.
That might be an extreme example, but Drogba's coaching ability has never been tested so in some ways a comparison with the likes of Phil Neville and Ryan Giggs fits.
But back to on the pitch.
Let's say Drogba performs to the maximum that he can at this stage in his career, he will still be short of the level that earned him legendary status among the Chelsea fans.
There are lucrative alternatives available for Drogba, with offers from Qatar, per The Daily Mail, and he should accept one of those.
Drogba's last kick of the ball for Chelsea was from the penalty spot to win the Champions League in 2012. It should stay that way.