It’s up front where United have the least amount of options but they do have players in attack in excellent form.
Morgan Gibbs-White and Iliman Ndiaye have been superb of late and the onus will be on them to get the goals United need to take the advantage going into Tuesday’s second leg at the City Ground on Tuesday.
Heckingbottom said earlier in the week: “Bill’s (Sharp) another few days closer. We’d like him to be (able to play), if he's available to play some part in the tie.
"If he’s not ready, he’s not ready. He is doing all he can and the staff are doing all they can to make sure there is that opportunity.”
“Morgan (Gibbs-White) has been back on the grass today (Thursday),” added the Blades boss.
"Conor (Hourihane) and Morgan didn’t train last week.
"We’re fine. George (Baldock) has had more training minutes in him, he’s looking good.
"Touch wood, everything at the minute is as good as it can be.”
Baldock returned to the substitutes bench against the Cottagers having limped off against Bristol City on Easter Monday with a hamstring injury.
9. Sander Berge
Now we are starting to see the real Sander Berge. He's going to be needed to barge through the Nottingham Forest midfield and allow opportunities for his attacking team mates to find space in dangerous areas. Will also hopefully be making those late runs into the box which defences find difficult to deal with Photo: Simon Bellis
10. Morgan Gibbs-White
Nailed-on starter, Morgan Gibbs-White would need to be on crutches for him not to be playing. Has such an important role to play such is his form in providing goals and assists and that partnership with Iliman Ndiaye is without doubt one of the most excising in the Championship Photo: Simon Bellis
11. Iliman Ndiaye
Iliman Ndiaye has scored in his last three games and shows no signs of stopping at this stage. Still young but his movement has improved in those recent matches allowing him to get into better positions when the ball is being played into the box. Photo: Simon Bellis