Under-fire Villa boss says Belgium hitman would have been sold for £100m if it hadn't been for a contract clause.
Pedro joined the Blues from Barcelona this summer.
Catalan giants travel to Belarus hoping to extend lead in Group E. Find out how to follow the match live in the UK.
Herrera was in sublime form on Saturday against Everton.
Karim Benzema has scored six goals in the league thus far for Real Madrid.
Jose Mourinho was without Diego Costa for three domestic games following the Spaniard's suspension.
Dutch winger remains out with a thigh injury but Lewandowski and Kingsley Coman are both fit
Thomas Muller has clarified his previous comments regarding wages in the premier league.
Jurgen Klopp tried to sign Divock Origi for Borussia Dortmund.
Louis van Gaal saw Manchester United bounce back against Everton after their defeat to Arsenal.
Gary Neville and Ryan Giggs tell homeless activists to stay on porperty until February during the coldest winter months.
Herrera got a goal and an assist in the 3-0 win over Everton.
Robben has not played since early September.
Mourinho was in attendance as Ukraine took on Spain last Monday.
Mourinho sold Mata just six months into his second spell at Stamford Bridge.
An England footballer has turned to the police after being blackmailed over a threesome video shared on Snapchat.
Klopp was an admirer of the young Belgian before he arrived on Merseyside.
Luke Shaw has been ruled out for six months after suffering a double leg break against PSV Eindhoven in the Champions League.
Ander Herrera scored his first goal in the league this season against Everton.
Theo Walcott has scored four goals and assisted four in all competitions this season.
Ireland will play the second leg of the match in Dublin.
Daniel Sturridge has made three PL appearances this season since his return and has scored two goals.
Juan Mata has scored four goals and provided six assists in 14 games in all competitions this season.
Chelsea have already lost one game more than they lost in the entire 2014/15 campaign.
Manchester United beat Everton 3-0 at Goodison Park to maintain third place in the league behind Manchester City and Arsenal.
Can a weakened Ireland progress without their captain Paul O'Connell?
The Gunners produced a superb second-half performance to defeat Watford on Saturday 17 October.
The Gunners secured a 3-0 victory at Watford on Saturday 17 October.
Republic of Ireland will be looking to avoid Sweden and Zlatan Ibrahimovic.
Arsenal travel to Vicarage Road for Saturday's late kick off.