This is a case where you would let Scripture interpret itself. Ephesians 6: 12 informs the true Christian what the conflict is all about. If that verse is not clear enough you can defer to Matthew 25: 41, where we are told the deliberate destination of said adversaries. That is why a Christian is to leave room for God's vengeance. Romans 12: 19.
The key to understanding the Lord's prayer is that everything is the will of God.
Lastly, there is a verse that likening Satan to a roaring lion seeking whom he may devour. That fits perfectly with the book of Job the first chapter.
Update 1: Scripture interpreting Scripture
The term "let the Scriptures interpret itself" means to let Bible truths empirically answer any doubts or questions you have as well as ignore false teachings from men/women and seek the answer for yourself.
If I were to say that there are only two ways to get the sum of nine by adding two whole (non-decimal) numbers, you would first need to check an example yourself to see whether my statement is true or false:
9 + 0 = 9
8 + 1 = 9
7 + 2 = 9
6 + 3 = 9
5 + 4 = 9
Based on the above equations, my statement would be false and you would know that I was not telling the truth.
Applying that same train of thought and example, if certain passages of Scripture build upon subtle facts and consistent truths, it would be wise, when reading it, to apply those truths to each verse (where context allows) because the Bible cannot contradict itself (it is God's word). Deviating from this approach leaves room for opinion, mistranslations and false teachings.
Revisiting the aforementioned passages of Scripture to develop premise
»[Ephesians 6: 11-12]
11 - Put on the full armor of God, so that you will be able to stand firm against the schemes of the devil.
12 - For our struggle is not against flesh and blood, but against the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places.
»[1 James 4: 7]:
Submit therefore to God. Resist the devil and he will flee from you.
»[Romans 12: 19]:
19 - Never take your own revenge, beloved, but leave room for the wrath of God, for it is written, "VENGEANCE IS MINE, I WILL REPAY," says the Lord.
»[Matthew 25: 41]:
41 - "Then He will also say to those on His left, 'Depart from Me, accursed ones, into the eternal fire which has been prepared for the devil and his angels;
»[1 Peter 5: 8]:
8 - Be of sober spirit, be on the alert. Your adversary, the devil, prowls around like a roaring lion, seeking someone to devour.
»[1 Job 1: 7]:
The LORD said to Satan, "Have you considered My servant Job? For there is no one like him on the earth, a blameless and upright man, fearing God and turning away from evil."
Putting it all together
So, after taking into account all of the Bible verses mentioned above and all the truths that they claim, when you come to Matthew 6:13, context (as well as a good grammatical parsing guide) should determine what it does or does not say.
Consider the King James Version lexicon, which says that the word "poneros" is an adjective that is genitive, singular and masculine.
πονηρου adjective - genitive singular masculine
poneros pon-ay-ros': hurtful, i.e. evil; figuratively, calamitous; also (passively) ill, i.e. diseased; but especially (morally) culpable, i.e. derelict, vicious, facinorous; neuter (singular) mischief, malice, or (plural) guilt;
Then, consider the passages of Scripture that denotes Satan as being a father to many.
»[John 8: 44]:
"You are of your father the devil, and you want to do the desires of your father. He was a murderer from the beginning, and does not stand in the truth because there is no truth in him. Whenever he speaks a lie, he speaks from his own nature, for he is a liar and the father of lies.
»[Matthew 13: 38 - 39]:
38 - and the field is the world; and as for the good seed, these are the sons of the kingdom; and the tares are the sons of the evil one;
39 - and the enemy who sowed them is the devil, and the harvest is the end of the age; and the reapers are angels.
Since the word was prefaced by "the" and cast as a nominative,
the evil one is a correct transliteration. That being said, however, and without going too far off into another tangent, in coming to this conclusion please defer to Gil's Exposition analysis and the following three passages of Scripture...
»[John 6: 70]:
Jesus answered them, "Did I Myself not choose you, the twelve, and yet one of you is a devil?"
»[John 13: 2]:
During supper, the devil having already put into the heart of Judas Iscariot, the son of Simon, to betray Him,
»[Matthew 4: 1]:
Then Jesus was led up by the Spirit into the wilderness to be tempted by the devil.
[Jesus was delivered from Satan (
the evil one) in the wilderness AFTER being tempted by him.]
☼[Matthew 6: 13]
And do not lead us into temptation, but deliver us from
the evil one. For Yours is the kingdom and the power and the glory forever. Amen.'
Thank you for reading,
If I have misspoken or misrepresented the bible in anyway please let me know and I will first research, and then correct any oversights if applicable.
Full disclosure: Up until now, when I recited the prayer, I used 'evil' and not 'the evil one' as that is how I memorized it as a kid.
www.biblehub.com (Greek lexicon + KJV Lexicon)
www.studylight.org (Indepth Greek lexicon with all possible definitions of a specific word)
www.gotquestions.org/Judas-Iscariot.html (To locate John 6: 70)
www.google.com (for definitions of nominative + genitive + definite article + facinorous)