Ryan Giggs must loathe the fact he can't help Manchester United out of their current rut.
The Welshman, who retired in 2014 and vacated his post as assistant manager earlier this year, can do little more than watch on as his beloved side struggle under Jose Mourinho.
A strong bid for the Premier League title was expected of the Red Devils this season and yet, with nine games played, they sit seventh on 14 points and six off the pace.
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Mourinho has yet to find a solution to United's struggles, but find it he must before his men lose touch with the likes of Manchester City, Arsenal, Liverpool and Chelsea, who occupy first to fourth respectively.
That very thought worries Giggs. In fact, the former winger has expressed concern that one club in particular look capable of winning the league this season: Liverpool.
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Writing for the Telegraph, he said: "Liverpool have put themselves in contention this year.
"At United, I always wondered, because of their history, that when - or if - that first Premier League title came along Liverpool might win a few more on the back of it.
"My view is that it will be more difficult in the present day for one club to dominate as United did in the 1990s and 2000s but Liverpool would not settle for one Premier League. They would want more.
"As for the prospect of Liverpool winning the league for the first time since 1990, they would not expect me to say anything other than it fills me with dread.
"A long time ago they challenged United to come back when we had won it 18 times. Twenty years later United had raised the bar to 20 and no one on my side wants to see it swing back the other way."
Giggs has every reason to be worried about Liverpool ending their wait for Premier League glory, with Jurgen Klopp's men on fire at present.
The Reds have won five of their last seven league games, during which time they've demolished Leicester City and Hull City and beaten Chelsea at Stamford Bridge.
And let's not forget, they beat Arsenal 4-3 away on the opening day of the season.
Sir Alex Ferguson is also of the opinion Liverpool are genuine title contenders and believes Klopp deserves a lot of credit for the job he's done on Merseyside.
"He has done a really good job and revived Liverpool’s enthusiasm," the Scotsman said.
"It can happen that big clubs lose it. For two decades, Liverpool changed managers without building their own identity.
"You can now well and truly sense that you have to count them in this year.
"You can see Klopp's dedication on the sideline, I'm convinced his work in training is similar. He's a strong personality. That's absolutely vital at a big club."