TEAM NEWS
Willian and Eden Hazard are expected to be restored to Chelsea's line-up after both were substitutes at Burnley.

Marcos Alonso continues a three-match ban for violent conduct after his challenge on Southampton's Shane Long last week.

Southampton duo Sofiane Boufal and Mario Lemina are being assessed after missing Thursday's draw at Leicester.
MATCH FACTS

Head-to-head

Southampton have progressed from four of their previous five FA Cup ties against Chelsea, but lost the most recent encounter 5-1 in the third round in 2012-13.Chelsea are vying for six straight wins against the Saints in all competitions for the first time.The last three league meetings have generated 12 goals, including five last weekend in Chelsea's 3-2 win at St. Mary's.

Chelsea

Chelsea have won 11 of their last 14 FA Cup semi-final matches.They will be appearing at the new Wembley for the 18th time, a record by a club playing at the stadium in a neutral capacity.The Blues have kept clean sheets in three of their five ties in reaching the semi-finals.Willian has contributed to 10 goals in 10 FA Cup matches (six goals, four assists) since the start of last season.Since his debut in English football in January 2013, Olivier Giroud has had a hand in 21 goals in his 25 FA Cup appearances (14 goals, seven assists), more than any other player in the competition over this period.Willy Caballero and Pedro are the only players to have played in all five Chelsea FA Cup matches this term.

Southampton

Southampton have reached the FA Cup semi-finals for the first time since 2003. They beat Watford 2-1 in that game but ultimately lost 1-0 to Arsenal in the final.Saints have lost five of their seven previous visits to Wembley in all competitions. They won the 1976 FA Cup final and 2010 Football League Trophy final.They have scored six goals during their FA Cup run (all by different scorers), whilst the only goal they have conceded was a Salomon Rondon strike in their 2-1 triumph at West Brom in the fifth round.Southampton boss Mark Hughes was an FA Cup winner as a player with opponents Chelsea in 1996-97.Hughes has lost both of his previous two FA Cup semi-finals as a manager: 3-0 to Arsenal in 2004-05 and 2-1 after extra time to Chelsea in 2006-07.Hughes has already been knocked out of the FA Cup once this season as his then-Stoke side were beaten by League Two club Coventry in the third round.