"I hope every player gets a good reception and that the fans get behind all the players. It will certainly help us as a team.
"Ashley is a top-quality left-back and on top form is possibly the best in the world. He is very important to this team and is going to be for many more years, which is another important reason why the fans should get behind him."
The 28-year-old full-back has also been targeted by opposition fans in domestic competition since his arrest for being drunk and disorderly at the beginning of the month. He was detained and fined £80 for swearing at police when he came out of a nightclub.
Cole did issue a public apology but he was still singled out for abuse in the FA Cup tie at Coventry and then against Tottenham at the weekend.
Capello is also known to be concerned about the state of the Wembley pitch and is believed to favour playing any potential two-legged World Cup play-off at Old Trafford at the end of the year.
FA chiefs, desperate to fill 90,000-capacity Wembley, cut usual top-price £58.50 and £48.90 tickets for Saturday's game with Slovakia to just £40.
But the poor sales mean Soho Square officials have also been forced to consider the rare move of selling tickets at the Wembley turnstiles on match day.
An FA spokesman said: "We've sold around 80,000 tickets for Slovakia, and Ukraine is just under 80,000. We haven't decided yet if we will sell tickets on the turnstiles."
England have embarrassingly struggled to fill Wembley this season despite playing only two home games so far.
There were more than 20,000 empty seats when 69,738 turned up to the August friendly with the Czech Republic — and the Kazakhstan game only sold out a week before the match.
Slovakia tickets cost £30 and £40 for adults, with £15 tickets for Under-16s in the family enclosure. Ukraine tickets are £29, £39, £48.90 and £58.50, with £15 children's seats.
